Question

我需要编写一个程序，检查数据错误后，员工是否出现在其经理之间。我创建了该过程但是我有一个与nr相关的错误（关键字IF附近的语法不正确）。为什么会出现，我该如何纠正它。我是使用SQL Server的初学者，所以欢迎任何帮助。

这是程序：

CREATE PROCEDURE IsManager( @Id INT)
 as
    WITH Managers
    AS (
        SELECT id, id_manager 1 AS LEVELC
        FROM [DBO].[employees]
        WHERE id = @Id
        UNION ALL
        SELECT P.id, P.id_manager H.LEVELC+1
        FROM  [DBO].[employees] E
        inner join Ancestors H
            ON E.id=H.id_manager
   )    
    SELECT COUNT(*) AS nr FROM (SELECT * FROM Managers where Managers.id=@Id
    IF nr=0
    PRINT 'Error '
    ELSE
    PRINT 'Your database has no errors'

Answer 1

试试

CREATE PROCEDURE IsManager( @Id INT)
 as
    declare @nr int

    WITH Managers(id, id_manager, levelc)
    AS (
        SELECT id, id_manager, 1 AS LEVELC
        FROM [DBO].[employees]
        WHERE id = @Id
        UNION ALL
        SELECT P.id, P.id_manager, H.LEVELC+1
        FROM  [DBO].[employees] E
        inner join Ancestors H
            ON E.id=H.id_manager
   )    

  SELECT @nr = COUNT(*) FROM Managers where Managers.id=@Id
  IF @nr=0
    PRINT 'Error '
  ELSE
    PRINT 'Your database has no errors'

'是他自己的经理'程序错误

1 个答案: