Question

我有这个存储过程

USE [all_things]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[sp_getThingsByType]
    @thingid int,
    @typeid int
AS

DECLARE @Sql NVARCHAR(MAX) = 'SELECT * from items'

IF @thingid IS NOT NULL
BEGIN
  SET @Sql += ' where thingid = @thingid'
END

IF @typeid IS NOT NULL
BEGIN
  SET @Sql += ' and TypeID = @typeid'
END

EXEC sp_executesql @sql, N'@thingid int,@typeid int',@thingid=@thingid,@typeid=@typeid;

测试用例：

当我使用thingid null并且typeid为null来运行时，我得到的结果非常完美。
提供thingid且typeid为null后，结果还可以
以下是结果不佳的结果：thingid为null并提供了typeid。一切都在归还。

我错过了什么？

由于

Answer 1

感谢@ tschmit007，我修复了它。

USE [all_things]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[sp_getThingsByType]
    @thingid int,
    @typeid int
AS

DECLARE @Sql NVARCHAR(MAX) = 'SELECT * from items'

IF @thingid IS NOT NULL
BEGIN
  SET @Sql += ' where thingid = @thingid'
END

IF @typeid IS NOT NULL AND @thingid IS NOT NULL
BEGIN
  SET @Sql += ' and TypeID = @typeid'
END

IF @typeid IS NOT NULL AND @thingid IS NULL
BEGIN
  SET @Sql += ' where TypeID = @typeid'
END

EXEC sp_executesql @sql, N'@thingid int,@typeid int',@thingid=@thingid,@typeid=@typeid;

sql server存储过程sp_executesql

1 个答案: