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📄 mysql-基本操作-7.htm

📁 微软数据库开发梦工场多媒体教学-My sql篇.rar
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<p><font color="#009900">变长字符串类型</font></p>
<p>   1: 显示数据库 <br>
    <br>
     SHOW DATABAS, </p>
<p>   2:当前选择的数据库, </p>
<p>   mysql&gt; SELECT DATABASE(); <br>
     +------------+ <br>
     | DATABASE() | <br>
     +------------+ <br>
     | test ; <br>
     +------------+ <br>
     | DATABASE() | <br>
     +------------+ <br>
     | test    | <br>
     +------------+ </p>
<p>  3: 当前数据库包含的表信息: </p>
<p>   mysql&gt; SHOW TABLES; <br>
     +---------------------+ <br>
     | Tables in test  <br>
     mysql&gt; SHOW TABLES; <br>
     +---------------------+ <br>
     | Tables in test   | <br>
     +---------------------+ <br>
     | mytable1      | <br>
     | mytable2      | <br>
     +---------------------+ </p>
<p>  4: 获取表结构 </p>
<p>   mysql&gt; desc mytable1; <br>
     +---------+-------------+------+-----+---------+-------+ <br>
     | Field  mysql&gt; desc mytable1; <br>
     +---------+-------------+------+-----+---------+-------+ <br>
     | Field  | Type  | Null | Key | Default | Extra | <br>
     +---------+-------------+------+-----+---------+-------+ <br>
     | s1  | varchar(20) | YES |NULL  |    | <br>
     +---------------------+------+-----+---------+-------+ </p>
<p>&nbsp; </p>
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