Sql 查询以下要求

我有一个带有列客户机代码的表

代码的范围为9990000和99999999

我要所有这些介于9990000到99999999之间的数字

未分配给客户端代码的

请帮助我进行此查询。

如果您只想选择介于9990000和99999999之间的范围

如果要选择介于9990000和99999999之间的排除范围

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据我所知，问题是：

SELECT * FROM Table WHERE ClientCode BETWEEN 99990000 AND -99999999

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您需要生成可能帐户的完整列表，然后排除正在使用的帐户

/*DECLARE VARIABLES FOR START AND END RANGE*/
DECLARE @StartAccount   AS  INT
DECLARE @EndAccount     AS  INT
SET     @StartAccount   =   99990000
SET     @EndAccount     =   99999999
;
--Generate a list of numbers to check against:..Thanks to Anthony Horne for this
   WITH Nbrs_4( n ) AS ( SELECT 1 UNION SELECT 0 ),
Nbrs_3( n ) AS ( SELECT 1 FROM Nbrs_4 n1 CROSS JOIN Nbrs_4 n2 ),
Nbrs_2( n ) AS ( SELECT 1 FROM Nbrs_3 n1 CROSS JOIN Nbrs_3 n2 ),
Nbrs_1( n ) AS ( SELECT 1 FROM Nbrs_2 n1 CROSS JOIN Nbrs_2 n2 ),
Nbrs_0( n ) AS ( SELECT 1 FROM Nbrs_1 n1 CROSS JOIN Nbrs_1 n2 ),
Nbrs  ( n ) AS ( SELECT 1 FROM Nbrs_0 n1 CROSS JOIN Nbrs_0 n2 )

SELECT n
FROM ( SELECT ROW_NUMBER() OVER (ORDER BY n)
FROM Nbrs ) D ( n )
WHERE n >= @StartAccount 
 AND n <= @EndAccount 
 AND n NOT IN 
(SELECT ClientCode FROM CustomerTable)  --Exclude Accounts that are in use

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你试过什么吗？你用的是哪种RDBMS？什么是表模式？您尝试了什么？您是否有效地查找指定范围内所有未使用的可能的客户帐号？您需要为该范围内所有可能的值创建一个派生表，然后从“客户代码”列中不存在的数字中进行选择。您所说的“未分配给客户代码”是什么意思？OP需要与之相反的所有介于9990000-99999999之间且未分配给客户代码的数字。

SELECT * FROM Table WHERE ClientCode BETWEEN 99990000 AND -99999999

/*DECLARE VARIABLES FOR START AND END RANGE*/
DECLARE @StartAccount   AS  INT
DECLARE @EndAccount     AS  INT
SET     @StartAccount   =   99990000
SET     @EndAccount     =   99999999
;
--Generate a list of numbers to check against:..Thanks to Anthony Horne for this
   WITH Nbrs_4( n ) AS ( SELECT 1 UNION SELECT 0 ),
Nbrs_3( n ) AS ( SELECT 1 FROM Nbrs_4 n1 CROSS JOIN Nbrs_4 n2 ),
Nbrs_2( n ) AS ( SELECT 1 FROM Nbrs_3 n1 CROSS JOIN Nbrs_3 n2 ),
Nbrs_1( n ) AS ( SELECT 1 FROM Nbrs_2 n1 CROSS JOIN Nbrs_2 n2 ),
Nbrs_0( n ) AS ( SELECT 1 FROM Nbrs_1 n1 CROSS JOIN Nbrs_1 n2 ),
Nbrs  ( n ) AS ( SELECT 1 FROM Nbrs_0 n1 CROSS JOIN Nbrs_0 n2 )

SELECT n
FROM ( SELECT ROW_NUMBER() OVER (ORDER BY n)
FROM Nbrs ) D ( n )
WHERE n >= @StartAccount 
 AND n <= @EndAccount 
 AND n NOT IN 
(SELECT ClientCode FROM CustomerTable)  --Exclude Accounts that are in use