Question

参考我的question我正在尝试这个选择语句并收到错误

Select * From    
(SELECT * FROM  FruitCrate WHERE FruitName IN (' +@FruitNames+ '))

WHERE FruitCrate.Eatable= 1

错误

关键字'WHERE'附近的语法不正确。

修改

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


ALTER PROCEDURE [dbo].[SPName]
(
    @FruitNames
)
AS

exec('SELECT  *  
    FROM FruitCrate
    WHERE FruitName IN (' +@FruitNames+ ')
    and Eatable = 1')

Answer 1

您应该将子查询命名为

Select * From    
(SELECT * FROM  FruitCrate WHERE FruitName IN (' +@FruitNames+ ')) tab    
WHERE tab.Eatable= 1

您应该将代码用作动态sql

exec('Select * From    
    (SELECT * FROM  FruitCrate WHERE FruitName IN (' +@FruitNames+ ')) tab    
    WHERE tab.Eatable= 1')

它适用于'apple','strawberry','banana'

之类的列表

Select * From    
(SELECT * FROM  FruitCrate WHERE FruitName IN ('apple','strawberry','banana')) tab    
WHERE tab.Eatable= 1

Answer 2

您无法将逗号分隔的字符串传递给in运算符。如果您使用and条件，则只需要1个查询。

exec('SELECT * 
      FROM FruitCrate 
      WHERE FruitName IN (' +@FruitNames+ ')
      and FruitCrate.Eatable= 1'

如果您想执行动态查询（这里就是这种情况），您必须使用exec

Answer 3

试试这个：

Select * From    
(SELECT * FROM FruitCrate WHERE FruitName IN (' +@FruitNames+ ')) as FruitCrateRes
WHERE FruitCrateRes.Eatable= 1

您使用了表名FruitCrate而没有重命名from子句的子查询输入

Answer 4

你为什么不使用

SELECT * FROM  FruitCrate WHERE FruitName IN (' +@FruitNames+ ')
WHERE FruitCrate.Eatable= 1

可能使用子查询，SQL引擎无法识别最后FruitCrate中的WHERE，因为未指定子查询名称。

您的IN条款也可能被滥用！

这个SQL语句出了什么问题

4 个答案: