---使用遊標
---1遊標的定義
--（1）定義
declare cur_MyStudent cursor fast_forword
for select * from MyStudent --基於返回一個結果集
--（2）打開
open cur_MyStudent
--(3)操作
fetch next from cur_MyStudent
while @@fetch_status=0 ---while循環說的是多條記錄的操作
begin
fetch next from cur_MyStudent
end
--(4)關閉
close cur_MyStudent
--(5)釋放
deallocate
select * from TblTeacher
select * from TblteacherSalary
------1將老師的工資更新，更新後的金額爲原來的工資+獎金。
----第一，定義兩個變量，來存放TblTeacherSalary表中的tTId和reward
declare @id int
declare @reward money
declare cur_Reward cursor fast_forward
for select tTId,reward from TblTeacherSalary ---基於查詢的數據集
open cur_Reward
fetch next from cur_Reward into @id,@reward
while @@fetch_status=0
begin
update TblTeacher set tTSalary=tTSalary+@reward where
tTId=@id
fetch next from cur_Reward into @id,@reward
end
close cur_Reward
deallocate cur_Reward
--2將獎金中的reward設置爲工資的0.1倍
declare @sid int
declare @salary money
--1定義遊標
declare cur_reward2 cursor fast_forward
for select tTId from TblTeacherSalary
--打開
open cur_reward2
fetch next from cur_reward2 into @SId
while @@fetch_status=0
begin
--set @salary=(select tTSalary from TblTeacher)
select @salary=tTSalary from TblTeacher
--更新獎金錶
update TblTeacherSalary set reward=@salary*0.1 where
tTId=@sid
end
close cur_reward2
deallocate cur_reward2