mysql 常用语句使用

1.查询语句

SELECT * FROM table

2.更改语句

UPDATE table SET name = '123456' WHERE id = 100

3.插入语句

INSERT INTO table VALUES(1,'0001','2009-01-01 00:00:02','192.168.1.1',2,NULL,NULL)

4.删除语句　

DELETE FROM zhw_dl WHERE id = 5

5.查找指定范围时间的数据

SELECT * FROM table WHERE timer BETWEEN '2017-06-01 00:00:00' AND '2017-06-01 23:59:59'

6.in-操作符

SELECT * FROM table WHERE id IN ('1','2')

7.MAX-操作符（取最大值）？&&MIN（取最小值）

SELECT MAX(id) FROM table

8.添加索引

ALTER TABLE 表名字 ADD INDEX 索引名字 ( 字段名字 )

主键索引：ALTER TABLE 表名字 ADD PRIMARY KEY (字段名字)

唯一索引：ALTER TABLE 表名字 ADD UNIQUE (字段名字)

9.将两个表中的指定数据插入到另一表中

INSERT INTO bbs_collect(userid,uid,hid,t) SELECT bbs_userid AS userid,u.id AS uid,h.id AS hid,'2017-06-13 17:57:19' AS t FROM bbs_user u,bbs_hao h WHERE u.jkx_userid = 'manasxx' AND h.zt IN (1,2)

　10.多表查询

SELECT s.*,sf.field1 AS nickname FROM pre_home_friend s,pre_common_member_profile sf WHERE s.uid=17 AND sf.uid=s.fuid LIMIT 24