MS SQL While循环代替游标
--create temp1 table create table #Grade( ID int identity(1,2), Name varchar(20), SubjectName varchar(20), Grade int ) --insert data insert into #Grade(Name,SubjectName,Grade) values(‘jimmy‘,‘Math‘,100) insert into #Grade(Name,SubjectName,Grade) values(‘jimmy‘,‘Chinese‘,110) insert into #Grade(Name,SubjectName,Grade) values(‘jimmy‘,‘English‘,90) insert into #Grade(Name,SubjectName,Grade) values(‘tom‘,‘Math‘,60) insert into #Grade(Name,SubjectName,Grade) values(‘tom‘,‘Chinese‘,80) insert into #Grade(Name,SubjectName,Grade) values(‘tom‘,‘English‘,90) insert into #Grade(Name,SubjectName,Grade) values(‘lina‘,‘Math‘,110) insert into #Grade(Name,SubjectName,Grade) values(‘lina‘,‘Chinese‘,120) insert into #Grade(Name,SubjectName,Grade) values(‘lina‘,‘English‘,50) --create and insert temp2 table create table #Temp( tID int identity(1,1), ID int) insert into #Temp (ID) select ID from #Grade --set para declare @begin int declare @count int declare @ID int set @begin=1 set @count=(select COUNT(*) from #Temp) --doing something while(@begin<=@count) begin set @ID=(select ID from #Temp where tID=@begin) update #Grade set Name=Name+‘ updated ‘ where ID=@ID set @begin=@begin+1 end select * from #Grade --drop temp table drop table #Temp --drop temp table drop table #Grade
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