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几个简单的基本的sql语句

时间:2021-07-01 10:21:17 帮助过:87人阅读

说明:几个简单的基本的sql语句

  选择:select * from table1 where 范围

  插入:insert into table1(field1,field2) values(value1,value2)

  删除:delete from table1 where 范围

  更新:update table1 set field1=value1 where 范围

  查找:select * from table1 where field1 like '%value1%' ---like的语法很精妙,查资料!

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

  总数:select count * as totalcount from table1

  求和:select sum(field1) as sumvalue from table1

  平均:select avg(field1) as avgvalue from table1

  最大:select max(field1) as maxvalue from table1

  最小:select min(field1) as minvalue from table1

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