Question

我有一个存储过程，用于从我的数据库中选择某个列(EventId) = x的所有行。当我在Visual Studio中使用GridView时，这很好用。然后我在GridView中添加了一个搜索功能，它也可以搜索得很好。

但是，添加了搜索功能后，我的存储过程不会根据EventId = x进行选择。相反，它显示所有行，尽管id。为什么？需要改变什么？例如，如果EventId = 80，它仍会显示EventId = 7 9和78等。

代码没有搜索有效！

ALTER PROCEDURE [dbo].[spGetAllRegistrantRapidResponse]
    -- Add the parameters for the stored procedure here

        @EventId int
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
    SELECT *
    FROM Registrant
    WHERE EventId = @EventId
    END

代码搜索不起作用！

ALTER PROCEDURE [dbo].[spGetAllRegistrantRapidResponse]
    -- Add the parameters for the stored procedure here

        @EventId int,
        @CompletedByFirstName nvarchar(20),
        @CompletedByLastName nvarchar(25),
        @FirstName nvarchar(20),
        @LastName nvarchar(25),
        @PaymentMethod nvarchar(50)
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
    SELECT *
    FROM Registrant
    WHERE EventId = @EventId AND
        CompletedByFirstName LIKE '%' + @CompletedByFirstName + '%'
        OR CompletedByLastName LIKE '%' + @CompletedByLastName + '%'
        OR FirstName LIKE '%' + @FirstName + '%'
        OR LastName LIKE '%' + @LastName + '%'
        OR PaymentMethod LIKE '%' + @PaymentMethod + '%'
    END

Answer 1

请限定您的条件; AND条件优先于此

 SELECT *
FROM Registrant
WHERE EventId = @EventId AND
    (CompletedByFirstName LIKE '%' + @CompletedByFirstName + '%'
    OR CompletedByLastName LIKE '%' + @CompletedByLastName + '%'
    OR FirstName LIKE '%' + @FirstName + '%'
    OR LastName LIKE '%' + @LastName + '%'
    OR PaymentMethod LIKE '%' + @PaymentMethod + '%')
END

Answer 2

and运算符的precedence运算符高于or运算符，因此您需要使用括号，否则事件ID检查仅适用于第一次like比较：

WHERE EventId = @EventId AND (
    CompletedByFirstName LIKE '%' + @CompletedByFirstName + '%'
    OR CompletedByLastName LIKE '%' + @CompletedByLastName + '%'
    OR FirstName LIKE '%' + @FirstName + '%'
    OR LastName LIKE '%' + @LastName + '%'
    OR PaymentMethod LIKE '%' + @PaymentMethod + '%'
  )

Answer 3

我认为你应该尝试类似的事情：

WHERE EventId = @EventId AND
        (CompletedByFirstName LIKE '%' + @CompletedByFirstName + '%'
        OR CompletedByLastName LIKE '%' + @CompletedByLastName + '%'
        OR FirstName LIKE '%' + @FirstName + '%'
        OR LastName LIKE '%' + @LastName + '%'
        OR PaymentMethod LIKE '%' + @PaymentMethod + '%')

合并AND和OR时，应使用括号。

存储过程的奇怪行为 - WHERE语句被忽略

3 个答案: