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学习MySQL常用操作命令_MySQL

Jun 01, 2016 pm 02:11 PM
mysql start up Order study Commonly used operate Way


  1、启动MySQL服务器
  
  实际上上篇已讲到如何启动MySQL。两种方法: 一是用winmysqladmin,如果机器启动时已自动运行,则可直接进入下一步操作。 二是在DOS方式下运行 d:mysqlbinmysqld
  
  2、进入mysql交互操作界面
  
  在DOS方式下,运行: d:mysqlbinmysql
  
  出现: mysql 的提示符,此时已进入mysql的交互操作方式。
  
  如果出现 "ERROR 2003: Can′t connect to MySQL server on ′localhost′ (10061)“,
  
  说明你的MySQL还没有启动。
  
  3、退出MySQL操作界面
  
  在mysql>提示符下输入quit可以随时退出交互操作界面:
  
  mysql> quit
  
  Bye
  
  你也可以用control-D退出。
  
  4、第一条命令
  
  mysql> select version(),current_date();
  
  +----------------+-----------------+
  
  | version() | current_date() |
  
  +----------------+-----------------+
  
  | 3.23.25a-debug | 2001-05-17 |
  
  +----------------+-----------------+
  
  1 row in set (0.01 sec)
  
  mysql>
  
  此命令要求mysql服务器告诉你它的版本号和当前日期。尝试用不同大小写操作上述命令,看结果如何。结果说明mysql命令的大小写结果是一致的。
  
  练习如下操作:
  
  mysql>Select (20+5)*4;
  
  mysql>Select (20+5)*4,sin(pi()/3);
  
  mysql>Select (20+5)*4 AS Result,sin(pi()/3); (AS: 指定假名为Result)
  
  5、多行语句
  
  一条命令可以分成多行输入,直到出现分号“;”为止:
  
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