sql cursor 简单测试小实例

游标实例

 

--项目实例

--1

declare @pk_user int
declare @organizeid int
declare Type_Cursor CURSOR forward_only FOR
 select top 1000000 pk_user,organizeid from EAP.dbo.zh_user
 where dr=0 and username in (
  select cardno from EAP.dbo.zh_card where dr=0 and cardno in
    (
    select username from EAP.dbo.zh_user zu,EAP.dbo.am_organize ao
    where topid in (select organizeid from EAP.dbo.zh_user where username =@cardno)
         and zu.dr=0 and ao.organizeid=zu.organizeid)
  and cardclass in (2,3)
 )

open Type_Cursor
fetch next from Type_Cursor into @pk_user,@organizeid
while(@@fetch_status=0)
begin       
  select  @pk_user,@organizeid
  exec ProCLearByUserID @pk_user,@organizeid
  fetch next from Type_Cursor into @pk_user,@organizeid
end     
CLOSE   Type_Cursor  
deallocate Type_Cursor

--2   

declare cur_MyCur1 cursor for select companyname from dbo.ViewAgentRelationUser where Topid is not null group by companyname
open cur_MyCur1
fetch cur_MyCur1 into @CorpName
while (@@FETCH_STATUS=0)
begin
 declare cur_MyCur2 cursor for select Topid from  ViewAgentRelationUser  
         where CompanyName=@CorpName and Topid is not null
    open cur_MyCur2
 fetch cur_MyCur2 into @Topid
 set @v_Topid='-1'
 while (@@FETCH_STATUS=0)
 begin
  set @v_Topid=@v_Topid+','+@Topid
  fetch cur_MyCur2 into @Topid
 END
 close cur_MyCur2
 deallocate cur_MyCur2

 

 

--自己测试小实例

declare cur cursor
read_only
for select username from BackUser where userId <=10
declare @username varchar(20)
open cur
fetch next from cur into @username
while(@@FETCH_STATUS =0)
begin
print @username
fetch next from cur into @username
end
close cur
deallocate cur
go
-----------------------
declare abc scroll cursor
for
select username from BackUser where userId <=10

declare @MyCursor cursor
set @Mycursor = abc

declare @MyCursor2 cursor
set @MyCursor2 = cursor local scroll FOR
select username from BackUser where userId <=10
----------------------1
declare contact_cursor cursor
for select * from BackUser where userId <=10
open contact_cursor
fetch next from contact_cursor
while @@FETCH_STATUS=0
begin
fetch next from contact_cursor
end
close contact_cursor
deallocate contact_cursor
-------------------------------2
declare @username varchar(50),@companyName varchar(50)
declare contact_cursor cursor for
select username,companyName from backuser where userId<=10
open contact_cursor
fetch next from contact_cursor into @username,@companyName
while @@FETCH_STATUS =0
begin
print 'UserName:'+@username+' CompanyName:'+@companyName
fetch next from contact_cursor into @username,@companyName
end
close contact_cursor
deallocate contact_cursor
go
------------------------------3
declare contact_cursor scroll cursor for
select username,companyName from backuser where userId<=10
open contact_cursor

fetch first from contact_cursor
fetch last from contact_cursor
fetch absolute 2 from contact_cursor
fetch relative -2 from contact_cursor
close contact_cursor
deallocate contact_cursor
go

--========================================= 使用循环游标

先遍历店铺类型，再遍历交易类型，

实现每个店铺每个交易类型遍历一次。

ALTER procedure [dbo].[USP_RTAS_T_GetTransactionSummaryReport]
 as
 DECLARE @Store_No VARCHAR(20)
 DECLARE @StoreName VARCHAR(50)
 declare @TRANSACTION_TYPE_ID INT
 declare @TRANSACTION_TYPE_Name varchar(50)
 
 DELETE FROM RTAS_T_GetTransactionSummaryReport
 
    declare curStore cursor read_only for
    SELECT Store_No,StoreName FROM dbo.Store
 declare curType cursor read_only for
    SELECT TRANSACTION_TYPE_ID,TRANSACTION_TYPE_Name FROM dbo.TransactionType WHERE TRANSACTION_TYPE_ID NOT IN (2,10)
 open curType
  fetch next from curType into @TRANSACTION_TYPE_ID,@TRANSACTION_TYPE_Name
  while(@@FETCH_STATUS =0)
   begin
    OPEN curStore
    fetch next from curStore into @Store_No,@StoreName
    while(@@FETCH_STATUS =0)
     BEGIN
      INSERT INTO RTAS_T_GetTransactionSummaryReport(Store_No,StoreName,TRANSACTION_TYPE_ID,TRANSACTION_TYPE_Name)
      SELECT @Store_No,@StoreName,@TRANSACTION_TYPE_ID,@TRANSACTION_TYPE_Name
      fetch next from curStore into @Store_No,@StoreName
     END
    close curStore
    fetch next from curType into @TRANSACTION_TYPE_ID,@TRANSACTION_TYPE_Name
   END
 close curType
 deallocate curStore
 deallocate curType