选择: select * from table1 where 范围html
插入: insert into table1(field1,field2) values(value1,value2)spa
删除: delete from table1 where 范围htm
更新: update table1 set field1=value1 where 范围blog
查找: select * from table1 where field1 like ’%value1%’ ---like的语法很精妙,查资料!排序
排序: select * from table1 order by field1,field2 [desc]table
总数: select count as totalcount from table1date
求和: select sum(field1) as sumvalue from table1select
平均: select avg(field1) as avgvalue from table1语法
最大: select max(field1) as maxvalue from table1tab
最小: select min(field1) as minvalue from table1
原文出处:https://www.cnblogs.com/panxinxian/p/11664199.html