Sql游标在无限循环中.这段代码有什么问题？

Question

嗨,我正在尝试循环表中的每个员工ID.

BEGIN
declare @empId nvarchar(50)
declare cur Cursor LOCAL for
select EmpId from EmployeeMaster 
open cur
fetch next from cur into @empId
     while @@FETCH_STATUS =0     
      begin      
       select  @empId  
      end   
close cur
END

这是我在存储过程中的查询.这有什么问题？它在无限循环中给我第一个员工ID.如果我在@@ FETCH_STATUS = 1时检查,则不给出输出.只是说 Command(s) completed successfully.

Answer 1

您需要fetch在选择后添加命令

BEGIN
declare @empId nvarchar(50)
declare cur Cursor LOCAL for
select EmpId from EmployeeMaster 
open cur
fetch next from cur into @empId
     while @@FETCH_STATUS =0     
      begin      
       select  @empId  
       fetch next from cur into @empId
      end   
close cur
END