请教一条数据库T-SQL语句,简单的判别语句,就是不知道啊
有表:employee    
 属性为:name   salary(工资) 
 现在要求把工资大于10000的定义为高工资,低于的叫低工资。 
 并且输出名字和工资,以及工资分类。要求用T-SQL语句。应该是IF..Else...的吗?? 
 ++++++++++++++++ 
 use   Company 
 declare   @vstr   varchar(10) 
 if(select   salary   from   employee) <30000 
 	begin    
 		set   @vstr= '低工资 '   		 
 	end 
 else   if(select   salary   from   employee) <50000 
 	begin 
 		set   @vstr= '中等工资 '		 
 	end 
 else 
    	begin 
 		set   @vstr= '高工资 '		 
 	end 
 select   name,salary,@vstr   from   employee; 
 ++++++++++++++++++++++++++++++++++++++++++ 
 这么写不对啊,应该怎么做??
------解决方案--------------------select name,salary,case when salary <30000 then  '低工资 '  
 			when salary between 30000 and 50000 then  '中等工资 ' 
 			else  '高工资 ' end as  '工资分类 ' 
 from employee
------解决方案--------------------這麼寫   
 Select 
 	name, 
 	salary, 
 	(Case When salary  <30000 Then  '低工资 '  
 		Else Case When  salary <50000 Then  '中等工资 ' 
 			Else  '高工资 ' End 
 		End) As 工资分类 
 From 
 	employee
------解决方案--------------------select name,salary,case when salary <10000 then  '低工资 '  
 			else  '高工资 ' end as 工资分类 
 from employee 
------解决方案--------------------declare @tb table([name] varchar(10),salary decimal(10,2)) 
 insert into @tb select  'liu ',10000 
 union all select  'zhen ',20000 
 union all select  'li ',8000 
 union all select  'yang ',25000   
 select [name],salary,salary,case  when salary> 10000 then  'high ' else  'low ' end as grade 
 from @tb
------解决方案--------------------楼主不要把简单的问题想复杂了,凡尽量往简单的方面想,没错的。。
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