我如何使用游标从表中删除记录

Question

我想用光标从表中删除记录.我该怎么做？

我使用MSSQL 2008 Express这段代码不会删除#temp中的任何内容.我也尝试过当前的cursor_name不起作用.

这是我的示例代码:

use AdventureWorks

drop table #temp
select * into #temp from HumanResources.Employee;

declare @eid as int;
declare @nid as varchar(15);


DECLARE Employee_Cursor CURSOR FOR
SELECT A.EmployeeID, A.NationalIDNumber FROM #temp AS A
OPEN Employee_Cursor;
FETCH NEXT FROM Employee_Cursor INTO @eid , @nid ;
WHILE @@FETCH_STATUS = 0
   BEGIN
      IF (@eid > 10)
      BEGIN
        delete from #temp where #temp.EmployeeID = @eid;
      END
      FETCH NEXT FROM Employee_Cursor;
   END;
CLOSE Employee_Cursor;
DEALLOCATE Employee_Cursor;
GO

select * from #temp

提前致谢

Answer 1

use AdventureWorks

select * into #temp from HumanResources.Employee;

declare @eid as int;
declare @nid as varchar(15);

DECLARE Employee_Cursor CURSOR FOR
SELECT A.EmployeeID, A.NationalIDNumber FROM #temp AS A
OPEN Employee_Cursor;
FETCH NEXT FROM Employee_Cursor INTO @eid , @nid ;
WHILE @@FETCH_STATUS = 0
   BEGIN
      IF (@eid > 10)
      BEGIN
        delete from #temp where current of Employee_Cursor
      END
      FETCH NEXT FROM Employee_Cursor INTO @eid , @nid ;
   END;
CLOSE Employee_Cursor;
DEALLOCATE Employee_Cursor;

select * from #temp

drop table #temp

这对我有用

Answer 2

有一个更简单的答案 - 使用这个命令：

delete from HumanResources.Employee where current of Employee_Cursor

它被称为“定位删除”并在MSDN 上进行了描述。