三、迴圈

--while迴圈計算1到100的和 
declare @a int
declare @sum int
set @a=1 
set @sum=0 
while @a<=100 
begin
    set @sum+=@a 
    set @a+=1 
end
print @sum
四、條件語句

--if,else條件分支 
if(1+1=2) 
begin
    print '對'
end
else
begin
    print '錯'
end

--when then條件分支 
declare @today int
declare @week nvarchar(3) 
set @today
 
=3 
set @week=case
    when @today=1 then '星期一'
    when @today=2 then '星期二'
    when @today=3 then '星期三'
    when @today=4 then '星期四'
    when @today=5 then '星期五'
    when @today=6 then '星期六'
    when @today=7 then '星期日'
    else '值錯誤'
end
print @week


五、遊標

declare @ID int
declare @Oid int
declare @Login
 
 varchar(50) 

--定義一個遊標 
declare user_cur cursor for select ID,Oid,[Login] from ST_User 
--開啟遊標 
open user_cur 
while @@fetch_status=0 
begin
--讀取遊標 
    fetch next from user_cur into @ID,@Oid,@Login 
    print @ID 
    --print @Login 
end
close user_cur 
--摧毀遊標 
deallocate user_cur