Question

我有以下存储过程。这很简单

ALTER PROCEDURE [dbo].[SPU_IsoSearch] 

@searchby varchar(4),
@userinput varchar(25)

AS
IF(@userinput IS NOT NULL)
BEGIN
  if(@searchby = 'fname')
     BEGIN
     SET NOCOUNT ON;
     SELECT CustID, CustFirstName, CustLastName, CustCity, CustEmail 
     FROM Customers where CustFirstName like '%' + @userinput + '%'
     ORDER BY CustFirstName
  END
END

然后，我执行它：

exec spu_isoSearch 'fname','de'

它不返回任何内容，只是一条消息＆＃34;命令已成功完成。＆＃34;

但如果我只写：

select * from Customers where CustFirstName like '%de%'

我会得到数据。

我在这里做错了什么？

谢谢

Answer 1

您的参数'searchby'是varchar（4），尝试更改为varchar（5）或适当的长度

由于它被声明为varchar（4），你的if语句会将'fnam'与'fname'进行比较，因为它们不相等，所以select语句不会执行

Answer 2

由于Ghost（用户）已经提到了参数长度，并且在侧面注释，您的程序可以更多地清理一下这样的事情..

ALTER PROCEDURE [dbo].[SPU_IsoSearch] 
@searchby varchar(5),    --<-- As pointed out by OP "Ghost"
@userinput varchar(25)
AS
BEGIN
  SET NOCOUNT ON;

  IF(@searchby = 'fname' AND @userinput IS NOT NULL) 
   BEGIN 
     SELECT CustID, CustFirstName, CustLastName, CustCity, CustEmail 
     FROM Customers where CustFirstName like '%' + @userinput + '%'
     ORDER BY CustFirstName
   END
END

存储过程不返回数据

2 个答案: