mysql> show tables;#查看当前数据库下的所有表 +--------------------+ | Tables_in_ceshi_ku | +--------------------+ | biao | | ceshi_biao | +--------------------+ 2 rows in set (0.00 sec) mysql> select * from biao;#查看该表所有的内容,*代表通配符,在这里是代表所有的列 +------+-----------+--------+----------+--------+ | id | name | gender | gongsi | gongzi | +------+-----------+--------+----------+--------+ | 1 | ma yun | n | tao bao | 6000.5 | | 2 | xiao hong | v | xin lang | 5000.7 | | 3 | xiao ming | n | bai du | 3000.4 | | 4 | li si | n | sou hu | 9000.2 | | 5 | lao wang | NULL | wang yi | 1000.5 | | 6 | xiao li | NULL | ku gou | 700.1 | +------+-----------+--------+----------+--------+ 6 rows in set (0.00 sec)
mysql> select * from biao where id>4;#查询所有列,部分行,即id大于4的行 +------+----------+--------+---------+--------+ | id | name | gender | gongsi | gongzi | +------+----------+--------+---------+--------+ | 5 | lao wang | NULL | wang yi | 1000.5 | | 6 | xiao li | NULL | ku gou | 700.1 | +------+----------+--------+---------+--------+ 2 rows in set (0.02 sec)
mysql> select name,gongzi from biao;#查询部分列,即"name"和"gongzi"列,之间用","隔开。选择所有行 +-----------+--------+ | name | gongzi | +-----------+--------+ | ma yun | 6000.5 | | xiao hong | 5000.7 | | xiao ming | 3000.4 | | li si | 9000.2 | | lao wang | 1000.5 | | xiao li | 700.1 | +-----------+--------+ 6 rows in set (0.02 sec)
mysql> select name from biao where gongzi>3000;#选择部分列,即"name"列,也可以多个列。然后选择工资>3000的行 +-----------+ | name | +-----------+ | ma yun | | xiao hong | | xiao ming | | li si | +-----------+ 4 rows in set (0.00 sec)
原文地址:http://blog.csdn.net/u013962600/article/details/27869207