1 选择：select * from table where 范围 2 插入：insert into table(field1,field2) values(value1,value2)3 删除：delete from table where 范围 4 更新：update table set field1=value1 where 范围 5 查找：select * from table where field1 like ’%value1%’6 排序：select * from ...
简答题：mysql5.5常用的语句有哪些？
1
选择：select * from table where 范围
2
插入：insert into table(field1,field2) values(value1,value2)
3
删除：delete from table where 范围
4
更新：update table set field1=value1 where 范围
5
查找：select * from table where field1 like ’%value1%’
6
排序：select * from table order by field1,field2 [desc]
7
总数：select count as totalcount from table
8
求和：select sum(field1) as sumvalue from table
9
平均：select avg(field1) as avgvalue from table
10
最大：select max(field1) as maxvalue from table
11
最小：select min(field1) as minvalue from table
12
例：
SELECT TOP 20 * FROM table
意思是：从table中查询前 20 项的全部内容
*可以用table中的内容表示
意思是：从table中查询前 20 项"某一项"的内容
SELECT SUM(grade) as total,average(grade) as average FROM table GROUP BY class
意思是：以班级为单位，查询这个班的总成绩和平均成绩
UPDATE table SET age=age+10
意思是：将 table 中所有人的年龄增加10岁2016-03-09
