随笔分类 -  数据库系统

常用SQL语句技法
摘要:下列语句部分是Mssql语句 10、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 tab 阅读全文

posted @ 2007-08-12 23:48 shawn 阅读(491) 评论(0) 推荐(0)

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