Question

我收到错误原因？

 ALTER PROCEDURE dbo.verifGuids

@value char(36),
@message char(1)Output
AS

 Begin

 select value FROM guids WHERE @value=value; 

  If @value=value 
  BEGIN
  DELETE value FROM guids WHERE @value=value ;
  SET @message = 0
  END

  Else 
  BEGIN
  Set @message = 1
  END

  Return @message

  END

谢谢

Answer 1

请您按以下方式尝试：

ALTER PROCEDURE dbo.verifGuids
@value char(36),
@message char(1)Output
AS
Begin

DECLARE @SelectValue char(36)

select @SelectValue = value FROM guids WHERE @value=value; 

If @value=@SelectValue 
BEGIN
    DELETE value FROM guids WHERE @value=value ;
    SET @message = 0
END
Else 
BEGIN
    Set @message = 1
END

Return @message
END

Answer 2

您没有将要查询的数据库值分配给变量进行比较。您还在删除时指定列。尝试这样的事情：

DELETE FROM guids WHERE value=@value;
IF @@ROWCOUNT > 0
BEGIN
    SET @message = 0
END
ELSE 
BEGIN
    SET @message = 1
END

存储过程语法结构

2 个答案: