MATCH Against In Boolean Mode

<p>今日はMySQLの外部参照について話したいと思います。<br />
慣れないキーワードがちょっと出てきますが、安心してください。<br />
MySQLの外部参照はこれだけで覚えます。</p>
<h2>キーワード</h3>
<p>CONSTRAINT<br />
REFERENCES<br />
RESTRICT<br />
NO ACTION<br />
CASCADE<br />
SET NULL</p>
<h2>基本用法</h3>
<p></p>

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			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
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CREATE TABLE 子テーブル名(子カラム名 データ型,
  CONSTRAINT キー名 FOREIGN KEY (子カラム名)
  REFERENCES 親テーブル名(親カラム名)
  ON DELETE reference_option
  ON UPDATE reference_option
) ENGINE=InnoDB;</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd593043722562159-1">1</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd593043722562159-2">2</div><div class="crayon-num" data-line="crayon-64953fd593043722562159-3">3</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd593043722562159-4">4</div><div class="crayon-num" data-line="crayon-64953fd593043722562159-5">5</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd593043722562159-6">6</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd593043722562159-1"><span class="crayon-e">CREATE </span><span class="crayon-i">TABLE</span><span class="crayon-h"> </span>子テーブル名<span class="crayon-sy">(</span>子カラム名<span class="crayon-h"> </span>データ型<span class="crayon-sy">,</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd593043722562159-2"><span class="crayon-h">&nbsp;&nbsp;</span><span class="crayon-i">CONSTRAINT</span><span class="crayon-h"> </span>キー名<span class="crayon-h"> </span><span class="crayon-e">FOREIGN </span><span class="crayon-e">KEY</span><span class="crayon-h"> </span><span class="crayon-sy">(</span>子カラム名<span class="crayon-sy">)</span></div><div class="crayon-line" id="crayon-64953fd593043722562159-3"><span class="crayon-h">&nbsp;&nbsp;</span><span class="crayon-i">REFERENCES</span><span class="crayon-h"> </span>親テーブル名<span class="crayon-sy">(</span>親カラム名<span class="crayon-sy">)</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd593043722562159-4"><span class="crayon-h">&nbsp;&nbsp;</span><span class="crayon-e">ON </span><span class="crayon-e">DELETE </span><span class="crayon-e">reference_option</span></div><div class="crayon-line" id="crayon-64953fd593043722562159-5"><span class="crayon-e">&nbsp;&nbsp;</span><span class="crayon-e">ON </span><span class="crayon-e">UPDATE </span><span class="crayon-i">reference_option</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd593043722562159-6"><span class="crayon-sy">)</span><span class="crayon-h"> </span><span class="crayon-i">ENGINE</span>=<span class="crayon-i">InnoDB</span><span class="crayon-sy">;</span></div></div></td>
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<p> </p>
<h2>reference_option</h3>
<h3>RESTRICT</h4>
<p>ON DELETE句やON UPDATE句にRESTRICTを指定した場合は、親テーブルに対して更新や削除を行うとエラーが発生します。RESTRICTはON DELETE句やON UPDATE句を明示的に指定しなかった場合に設定される値です。</p>
<h3>NO ACTION</h4>
<p>ON DELETE句やON UPDATE句にNO ACTIONを指定した場合は、親テーブルに対して更新や削除を行うとエラーが発生します。MySQLにおいてはNO ACTIONとRESTRICTは同じ挙動となります。</p>
<h3>CASCADE</h4>
<p>ON DELETE句やON UPDATE句にCASCADEを指定した場合は、親テーブルに対して更新を行うと子テーブルで同じ値を持つカラムの値も合わせて更新されます。また親テーブルに対して削除を行うと子テーブルで同じ値を持つデータが削除されます。</p>
<h3>SET NULL</h4>
<p>ON DELETE句やON UPDATE句にSET NULLを指定した場合は、親テーブルに対して更新を行うと子テーブルで同じ値を持つカラムの値がNULLに更新されます。また親テーブルに対して削除を行うと子テーブルで同じ値を持つデータのカラムの値がNULLに更新されます。</p>
<h2>参考リンク</h3>
<p><a href="http://dev.mysql.com/doc/refman/5.1/ja/innodb-foreign-key-constraints.html" target="_blank">http://dev.mysql.com/doc/refman/5.1/ja/innodb-foreign-key-constraints.html</a><br />
<a href="http://www.dbonline.jp/mysql/table/index12.html" target="_blank">http://www.dbonline.jp/mysql/table/index12.html</a></p>

【MySQL】外部参照について

<h2>FULLTEXT</h3>
<p>FULLTEXTとは全文検索インデックスの事です。</p>
<p>利用できるデータベースはMyISAM型データベースのみです。</p>
<p>MyISAM型はテーブル作成時に設定できます。</p>

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			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
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CREATE TABLE table_name (
  id INT
) ENGINE=MyISAM;</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd592e56315761904-1">1</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd592e56315761904-2">2</div><div class="crayon-num" data-line="crayon-64953fd592e56315761904-3">3</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd592e56315761904-1"><span class="crayon-e">CREATE </span><span class="crayon-e">TABLE </span><span class="crayon-e">table_name</span><span class="crayon-h"> </span><span class="crayon-sy">(</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd592e56315761904-2"><span class="crayon-h">&nbsp;&nbsp;</span><span class="crayon-e">id </span><span class="crayon-t">INT</span></div><div class="crayon-line" id="crayon-64953fd592e56315761904-3"><span class="crayon-sy">)</span><span class="crayon-h"> </span><span class="crayon-i">ENGINE</span>=<span class="crayon-i">MyISAM</span><span class="crayon-sy">;</span></div></div></td>
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<p> </p>
<p>また、既存のテーブルをMyISAM型に設定する事も出来ます。</p>

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			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
 ALTER TABLE table_name ENGINE MyISAM; </textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd592e5a133533955-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd592e5a133533955-1"><span class="crayon-h"> </span><span class="crayon-e">ALTER </span><span class="crayon-e">TABLE </span><span class="crayon-e">table_name </span><span class="crayon-e">ENGINE </span><span class="crayon-i">MyISAM</span><span class="crayon-sy">;</span><span class="crayon-h"> </span></div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p> </p>
<h2>Fulltextの設定</h3>
<p></p>

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			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
CREATE TABLE table_name (
       id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
       title VARCHAR(200),
       body TEXT,
       FULLTEXT (title,body)
  );</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd592e5b154149767-1">1</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd592e5b154149767-2">2</div><div class="crayon-num" data-line="crayon-64953fd592e5b154149767-3">3</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd592e5b154149767-4">4</div><div class="crayon-num" data-line="crayon-64953fd592e5b154149767-5">5</div><div class="crayon-num crayon-striped-num" data-line="crayon-64953fd592e5b154149767-6">6</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd592e5b154149767-1"><span class="crayon-e">CREATE </span><span class="crayon-e">TABLE </span><span class="crayon-e">table_name</span><span class="crayon-h"> </span><span class="crayon-sy">(</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd592e5b154149767-2"><span class="crayon-h">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-e">id </span><span class="crayon-t">INT</span><span class="crayon-h"> </span><span class="crayon-t">UNSIGNED</span><span class="crayon-h"> </span><span class="crayon-e">AUTO_INCREMENT </span><span class="crayon-st">NOT</span><span class="crayon-h"> </span><span class="crayon-t">NULL</span><span class="crayon-h"> </span><span class="crayon-e">PRIMARY </span><span class="crayon-i">KEY</span><span class="crayon-sy">,</span></div><div class="crayon-line" id="crayon-64953fd592e5b154149767-3"><span class="crayon-h">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-e">title </span><span class="crayon-e">VARCHAR</span><span class="crayon-sy">(</span><span class="crayon-cn">200</span><span class="crayon-sy">)</span><span class="crayon-sy">,</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd592e5b154149767-4"><span class="crayon-h">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-e">body </span><span class="crayon-i">TEXT</span><span class="crayon-sy">,</span></div><div class="crayon-line" id="crayon-64953fd592e5b154149767-5"><span class="crayon-h">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-e">FULLTEXT</span><span class="crayon-h"> </span><span class="crayon-sy">(</span><span class="crayon-i">title</span><span class="crayon-sy">,</span><span class="crayon-i">body</span><span class="crayon-sy">)</span></div><div class="crayon-line crayon-striped-line" id="crayon-64953fd592e5b154149767-6"><span class="crayon-h">&nbsp;&nbsp;</span><span class="crayon-sy">)</span><span class="crayon-sy">;</span></div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p> </p>
<h2>MATCH &#8230;. AGAINST</h3>
<p>⬆に作成したテーブルに対して検索を行う場合は以下のように書きます。</p>

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			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
SELECT * FROM table_name WHERE MATCH (title,body) AGAINST ('database mysql');</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd592e5d956525213-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd592e5d956525213-1"><span class="crayon-e ">SELECT *</span><span class="crayon-h"> </span><span class="crayon-e">FROM </span><span class="crayon-e">table_name </span><span class="crayon-e">WHERE </span><span class="crayon-e">MATCH</span><span class="crayon-h"> </span><span class="crayon-sy">(</span><span class="crayon-i">title</span><span class="crayon-sy">,</span><span class="crayon-i">body</span><span class="crayon-sy">)</span><span class="crayon-h"> </span><span class="crayon-e">AGAINST</span><span class="crayon-h"> </span><span class="crayon-sy">(</span><span class="crayon-s">'database mysql'</span><span class="crayon-sy">)</span><span class="crayon-sy">;</span></div></div></td>
					</tr>
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		</div>

<p>「title」「body」の中に「database」と「mysql」という文字郡を検索する。<br />
結果として「database」と「mysql」が含まれるレコードが、<br />
順位づけられて返ってきます。</p>

FULLTEXT と MATCH &#8230;.AGAINST

<p>今日はmysqlの予約語について、やさしい話をしましょう。</p>
<h2>「予約語」と「識別子」</h3>
<p>mysqlには、select、from、 insert、into、joinなどの特定語があります。それらを「予約語」といいます。<br />
mysqlのテーブル名やカラム名といった「識別子」には、基本的に「予約語」が使えません※。</p>
<p>※「予約語」を「`」で囲んだら使えますが、<a href="http://ja.wikipedia.org/wiki/%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E9%96%A2%E4%BF%82%E3%83%9E%E3%83%83%E3%83%94%E3%83%B3%E3%82%B0" target="_blank">ORM</a>を用いる各言語のフレームワークが対応していない場合があるため、「予約語」を「識別子」として使うことはお勧めできません。</p>
<p>例えば、注文のテーブルを作ろうとして、テーブル名をorderと命名するとします。</p>
<p></p>

		<div id="crayon-64953fd592c74079833880" class="crayon-syntax crayon-theme-monokai crayon-font-monaco crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover wrap" style=" margin-top: 12px; margin-bottom: 12px; font-size: 13px !important; line-height: 18px !important;">
		
			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
create table order (id int, name varchar(255)...);</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd592c74079833880-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd592c74079833880-1"><span class="crayon-e">create </span><span class="crayon-e">table </span><span class="crayon-e">order</span><span class="crayon-h"> </span><span class="crayon-sy">(</span><span class="crayon-e">id </span><span class="crayon-t">int</span><span class="crayon-sy">,</span><span class="crayon-h"> </span><span class="crayon-e">name </span><span class="crayon-e">varchar</span><span class="crayon-sy">(</span><span class="crayon-cn">255</span><span class="crayon-sy">)</span><span class="crayon-sy">.</span><span class="crayon-sy">.</span><span class="crayon-sy">.</span><span class="crayon-sy">)</span><span class="crayon-sy">;</span></div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p>ではSQL syntaxエラーが出ますが、</p>
<p></p>

		<div id="crayon-64953fd592c78010795743" class="crayon-syntax crayon-theme-monokai crayon-font-monaco crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover wrap" style=" margin-top: 12px; margin-bottom: 12px; font-size: 13px !important; line-height: 18px !important;">
		
			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
create table `order` (id int, name varchar(255)...);</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd592c78010795743-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd592c78010795743-1"><span class="crayon-e">create </span><span class="crayon-i">table</span><span class="crayon-h"> </span><span class="crayon-sy">`</span><span class="crayon-i">order</span><span class="crayon-sy">`</span><span class="crayon-h"> </span><span class="crayon-sy">(</span><span class="crayon-e">id </span><span class="crayon-t">int</span><span class="crayon-sy">,</span><span class="crayon-h"> </span><span class="crayon-e">name </span><span class="crayon-e">varchar</span><span class="crayon-sy">(</span><span class="crayon-cn">255</span><span class="crayon-sy">)</span><span class="crayon-sy">.</span><span class="crayon-sy">.</span><span class="crayon-sy">.</span><span class="crayon-sy">)</span><span class="crayon-sy">;</span></div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p>と書けば、syntaxエラーがでません。</p>
<h2>mysqlの内部関数名はどうなる？</h3>
<p>mysqlの内部関数名（例えば、count関数）は、「予約語」ではないので、「識別子」として使えます。<br />
また、mysqlの内部関数を使うときは、その直後に「スペース」の使用は許可されていません。<br />
なぜなら、直後に「スペース」を使うと、それが関数名か、もしくはテーブル名（カラム名）か分からなくなるからのです。</p>
<h2>mysqlの予約語一覧</h3>
<p>下記リンクからご覧いただけます。<br />
<a href="http://dev.mysql.com/doc/refman/5.1/ja/reserved-words.html" target="_blank">http://dev.mysql.com/doc/refman/5.1/ja/reserved-words.html</a></p>

【MySQL】予約語について

Mysqlの初歩の初歩を学んだのでまとめました

MySQL အေျခခံ

<p>dumpを使ってデータベースのバックアップをします。</p>
<p>ダンプとは、デバッグやデータ修復のために、ファイルやメモリの内容をディスクに記録または表示することです。</p>
<p>データベースにおいては、データベース情報をファイルに書き出して保存することをダンプと呼びます。</p>
<h2>データベースのバックアップ</h3>
<p></p>

		<div id="crayon-64953fd58ded4683996312" class="crayon-syntax crayon-theme-monokai crayon-font-monaco crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover wrap" style=" margin-top: 12px; margin-bottom: 12px; font-size: 13px !important; line-height: 18px !important;">
		
			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
mysqldump -u ユーザ名 -p DB名 &gt; 出力先ファイル名</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd58ded4683996312-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd58ded4683996312-1"><span class="crayon-i">mysqldump</span><span class="crayon-h"> </span>-<span class="crayon-i">u</span><span class="crayon-h"> </span>ユーザ名<span class="crayon-h"> </span>-<span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-i">DB</span>名<span class="crayon-h"> </span><span class="crayon-h">&gt;</span><span class="crayon-h"> </span>出力先ファイル名</div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p> </p>
<p>例えば：</p>
<p></p>

		<div id="crayon-64953fd58ded9941582459" class="crayon-syntax crayon-theme-monokai crayon-font-monaco crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover wrap" style=" margin-top: 12px; margin-bottom: 12px; font-size: 13px !important; line-height: 18px !important;">
		
			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
mysqldump -u root -p test &gt; dump.sql</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd58ded9941582459-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd58ded9941582459-1"><span class="crayon-i">mysqldump</span><span class="crayon-h"> </span>-<span class="crayon-i">u</span><span class="crayon-h"> </span><span class="crayon-i">root</span><span class="crayon-h"> </span>-<span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-i">test</span><span class="crayon-h"> </span><span class="crayon-h">&gt;</span><span class="crayon-h"> </span><span class="crayon-i">dump</span><span class="crayon-sy">.</span><span class="crayon-i">sql</span></div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p> </p>
<h2>データベースの復元</h3>
<p></p>

		<div id="crayon-64953fd58deda372404333" class="crayon-syntax crayon-theme-monokai crayon-font-monaco crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover wrap" style=" margin-top: 12px; margin-bottom: 12px; font-size: 13px !important; line-height: 18px !important;">
		
			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
mysql -u ユーザ名 -p DB名 &lt; ダンプファイル名</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd58deda372404333-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd58deda372404333-1"><span class="crayon-i">mysql</span><span class="crayon-h"> </span>-<span class="crayon-i">u</span><span class="crayon-h"> </span>ユーザ名<span class="crayon-h"> </span>-<span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-i">DB</span>名<span class="crayon-h"> </span><span class="crayon-h">&lt;</span><span class="crayon-h"> </span>ダンプファイル名</div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p> </p>
<p>例えば：</p>
<p></p>

		<div id="crayon-64953fd58dedb315511756" class="crayon-syntax crayon-theme-monokai crayon-font-monaco crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover wrap" style=" margin-top: 12px; margin-bottom: 12px; font-size: 13px !important; line-height: 18px !important;">
		
			<div class="crayon-toolbar" data-settings=" mouseover overlay hide delay" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><span class="crayon-title"></span>
			<div class="crayon-tools" style="font-size: 13px !important;height: 19.5px !important; line-height: 19.5px !important;"><div class="crayon-button crayon-nums-button" title="Toggle Line Numbers"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-plain-button" title="Toggle Plain Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-expand-button" title="Expand Code"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-copy-button" title="Copy"><div class="crayon-button-icon"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window"><div class="crayon-button-icon"></div></div></div></div>
			<div class="crayon-info" style="min-height: 19.5px !important; line-height: 19.5px !important;"></div>
			<div class="crayon-plain-wrap"><textarea  class="crayon-plain print-no" data-settings="dblclick" readonly style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 13px !important; line-height: 18px !important;">
mysql -u root -p test &lt; dump.sql</textarea></div>
			<div class="crayon-main" style="">
				<table class="crayon-table">
					<tr class="crayon-row">
				<td class="crayon-nums " data-settings="show">
					<div class="crayon-nums-content" style="font-size: 13px !important; line-height: 18px !important;"><div class="crayon-num" data-line="crayon-64953fd58dedb315511756-1">1</div></div>
				</td>
						<td class="crayon-code"><div class="crayon-pre" style="font-size: 13px !important; line-height: 18px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"><div class="crayon-line" id="crayon-64953fd58dedb315511756-1"><span class="crayon-i">mysql</span><span class="crayon-h"> </span>-<span class="crayon-i">u</span><span class="crayon-h"> </span><span class="crayon-i">root</span><span class="crayon-h"> </span>-<span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-i">test</span><span class="crayon-h"> </span><span class="crayon-h">&lt;</span><span class="crayon-h"> </span><span class="crayon-i">dump</span><span class="crayon-sy">.</span><span class="crayon-i">sql</span></div></div></td>
					</tr>
				</table>
			</div>
		</div>

<p> </p>

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