mysql常用语句

SQL语句

简单的SQL语句

查找：SELECT * from table1 where 范围 

添加：insert into table1(列1,列2) VALUES(值1,值2)

删除：delete from table1 where 范围

更新：update table1 set username='张三' where 范围

带Like的查询：select *from table where field1 like '%value1%' 

排序：               select * from table1 order by field1,field2[desc]

查询共有多少条数据：select count(*)from as totable from table1;

查询出某一列的总和：select sum(price) as sumvalue from table1

查询出某一列的平均值：select avg(price) as avgvalue from table1

查询出某一列的最大值：SELECT max(price) as maxvalue from table;

查询出某一列的最小值：select min(price) as minvalue from table;