sql - 查询以下要求

Question

我有一个带有列客户端代码的表。

代码范围为 99990000 和 99999999。

我想要这个范围内的所有数字（ 99990000 -99999999 ）

未分配给客户代码。

请帮我解决这个问题。

Answer 1

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

Answer 2

如果您只想选择之间的范围99990000 AND 99999999

SELECT * FROM 
myTable 
WHERE ClientCode BETWEEN (99990000 AND 99999999)

如果要选择排除范围99990000 AND 99999999

SELECT * FROM 
myTable 
WHERE ClientCode NOT BETWEEN (99990000 AND 99999999)

Answer 3

据我了解这个问题，这将是查询：

SELECT * FROM Table WHERE ClientCode BETWEEN 99990000 AND -99999999