3

您好我正在使用带有 IN 运算符的简单查询。我正在使用以下查询

SELECT CustID  FROM Customer WHERE CustID in (6,34,5,4,3,2,1)

现在它显示以下订单

custId  
1   
2   
3   
4   
5   
6   
34

IN但我希望结果与我在子句中传递的序列相同。

4

6 回答 6

3 
SELECT CustID  FROM Customer WHERE CustID in (6,34,5,4,3,2,1)
ORDER BY  CASE WHEN CustId = 34
               THEN 5.5
               ELSE CustId
          END DESC
于 2013-04-15T06:12:23.567 回答
2

试试这个 Query Ramdas ......

SELECT CustID  FROM Customer WHERE CustID in (6,34,5,4,3,2,1) 
ORDER BY CHARINDEX(','+CAST(CustID as varchar(MAX))+',', ',6,34,5,4,3,2,1,')
于 2013-04-16T04:02:43.883 回答
0

试试这个——

DECLARE @id TABLE
(
      i INT IDENTITY(1,1)
    , id INT
)

INSERT INTO @id (id)
VALUES (6),(34),(5),(4),(3),(2),(1)

SELECT c.CustID  
FROM dbo.Customer c
JOIN @id i ON i.id = c.CustID
ORDER BY i.i
于 2013-04-15T06:13:54.333 回答
0

使用带有有序值的拆分字符串 CTE。因此，您将能够对任何数据集进行排序

DECLARE @test nvarchar(100) = '6,34,5,4,3,2,1';
;WITH cte AS
 (
  SELECT SUBSTRING(@test , 0, CHARINDEX( ',', @test)) AS val ,
         CAST(STUFF (@test + ',' , 1, CHARINDEX( ',', @test), '') AS nvarchar(100 )) AS stval,
         1 AS [level]
  UNION ALL
  SELECT SUBSTRING(stval , 0, CHARINDEX( ',', stval)),
         CAST(STUFF (stval, 1, CHARINDEX(',' , stval ), '' ) AS nvarchar(100 )),
         [level] + 1
  FROM cte
  WHERE stval != ''
  )
  SELECT c2.CustID
  FROM dbo.Customer c2 JOIN cte c ON c2.CustID = c.val
  ORDER BY c.[level]

SQLFiddle上的演示

您也可以将 CTE 包装在函数中

CREATE FUNCTION dbo. SplitStrings_CTE(@List nvarchar( 1000), @Delimiter nvarchar(1 ))
RETURNS TABLE
AS
RETURN
WITH cte AS
 (
  SELECT SUBSTRING(@List , 0 , CHARINDEX (@Delimiter, @List)) AS val ,
         CAST(STUFF (@List + @Delimiter, 1 , CHARINDEX (@Delimiter, @List), '') AS nvarchar (1000)) AS stval, 1 AS [level]
  UNION ALL
  SELECT SUBSTRING(stval , 0 , CHARINDEX (@Delimiter, stval)),
         CAST(STUFF (stval , 1, CHARINDEX( @Delimiter , stval ), '' ) AS nvarchar(1000 )), [level] + 1
  FROM cte
  WHERE stval != ''
  )
  SELECT REPLACE(val , ' ' , '' ) AS val, [level]
  FROM cte

使用函数的 SELECT 语句

DECLARE @test nvarchar(100) = '6,34,5,4,3,2,1';
SELECT CustID
FROM dbo.Customer c2 JOIN (SELECT val, [level] FROM dbo.SplitStrings_CTE(@test, ',')
                           ) c ON c2.CustID = c.val
ORDER BY c.[level]

或者

DECLARE @test nvarchar(100) = '6,34,5,4,3,2,1';
SELECT CustID
FROM dbo.Customer c2 CROSS APPLY dbo.SplitStrings_CTE(@test, ',') c                           
WHERE c2.CustID = c.val
ORDER BY c.[level]
于 2013-04-15T09:31:03.237 回答
0

标准 SQL 没有在select语句或in子句中指定默认顺序。这些行将以 DBMS 想要的任何顺序返回。

如果您想强制执行特定的顺序，则需要使用 order-by 子句。

一些 SQL实现可能允许配置它，但不是我经常使用的任何一个。最坏的情况，您可以尝试以下方法：

select 1 as x, custid from customer where custid = 6
union all select 2 as x, custid from customer where custid = 34
union all select 3 as x, custid from customer where custid = 5
order by x

但它非常丑陋而且效率不高。

于 2013-04-15T06:08:11.910 回答
0

你不能，如果你想让这种情况发生，你需要一个新的字段，比如“showorder”之类的，你可以在上面订购你的结果：

SELECT CustID FROM Customer WHERE CustID IN (6,34,5,4,3,2,1) ORDER BY showorder
于 2013-04-15T06:08:32.987 回答