LS庆

摘要： 用法一：等值判断，相当于switchCASE expression WHEN value1 THEN returnValue1 WHEN value2 THEN returnValue2 WHEN value3 THEN returnValue3 ELSE defaultValue END例子：论坛中用户的等级create table [user]( uId int identity(1,1) primary key, name varchar(50), level int --1骨灰 2大虾 3菜鸟)insert into [user] (name,level) value... 阅读全文