1：游标的使用：
sql Server游标的使用【转】
http://www.cnblogs.com/moss_tan_jun/archive/2011/11/26/2263988.html
declare @date2 datetime
declare tabB_cursor cursor for
select date,weekNum,studyTime from @tabB WHERE date > @date order by date
open tabB_cursor
fetch NEXT from tabB_cursor into @date2,@weekNumB,@studyTimeB
WHILE @@FETCH_STATUS = 0
begin
if @weekNumB !=7
insert into @tabC values (@weekNum,@date2,@sequence,@courseID,@chapterID,@studyTime)
else if @weekNumB=7
begin
set @weekNum=@weekNum+1
end
fetch NEXT from tabB_cursor into @date2,@studyTimeB
end
close tabB_cursor
deallocate tabB_cursor
2：使用表变量：
USE [DB] GO /****** Object: StoredProcedure [dbo].[P_TeacherStatis] Script Date: 11/26/2014 09:07:01 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROC [dbo].[P_TeacherStatis] AS DECLARE @TeacherIDSet TABLE (teacherID INT,status INT) DECLARE @TeaNum INT, @v_teacherID varchar(max), @v_adviserClassNum INT, @v_adviserMemberTotal INT, @v_adminClassNum INT, @v_adminMemberTotal INT, @errorCode INT SET @errorCode=0 --开启事物 Begin Set NOCOUNT ON; Set XACT_ABORT ON; BEGIN TRY BEGIN TRANSACTION -- 直接清空表 TruncATE TABLE ADVC_TEACHER_STATIS --创建 所有的老师的teacherID 集合 INSERT INTO @TeacherIDSet (teacherID,status) select teacherID,1 from ADVC_TEACHER WITH (NOLOCK) WHERE status=1 SELECT @TeaNum=COUNT(*) FROM @TeacherIDSet WHERE status=1 WHILE @TeaNum>0 BEGIN SELECT TOP 1 @v_teacherID=teacherID FROM @TeacherIDSet WHERE status=1 -- 这个老师是班主任 管理的班级,管理的班级个数 select @v_adviserClassNum = COUNT(case when act.teacherType =1 then 1 end),@v_adminClassNum = count(*) from ADVC_CLASS_TEACHER act WITH (NOLOCK) inner join ADVC_CLASS ac WITH (NOLOCK) on ac.classID = act.classID where ac.status=1 and act.teacherID = @v_teacherID -- 作为班主任 管理学员总数 SELECT @v_adviserMemberTotal = SUM(case when CT.teacherType = 1 then C.currCount ELSE 0 end) ,@v_adminMemberTotal = SUM(C.currCount) FROM ADVC_CLASS C WITH(NOLOCK) inner JOIN ADVC_CLASS_TEACHER CT WITH (NOLOCK) ON CT.classID = C.classID inner JOIN ADVC_TEACHER TEA WITH (NOLOCK) ON CT.TeacherID = TEA.TeacherID where C.status=1 and CT.teacherID = @v_teacherID -- 直接清空了，下面就直接插入 INSERT INTO [ADVC_TEACHER_STATIS] ([teacherID],[adviserClassNum],[adviserMemberTotal],[adminClassNum],[adminMemberTotal]) values (@v_teacherID,@v_adviserClassNum,@v_adviserMemberTotal,@v_adminClassNum,@v_adminMemberTotal) UPDATE @TeacherIDSet SET status = 0 WHERE teacherID=@v_teacherID SELECT @TeaNum=COUNT(*) FROM @TeacherIDSet WHERE status=1 END --结束事物 COMMIT TRANSACTION END TRY BEGIN CATCH ROLLBACK TRANSACTION SET @errorCode=-1 --失败 END CATCH End --print convert(varchar(20),@errorCode) RETURN @errorCode
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