alfanumerica in SQL Server

Question

ho bisogno di generare un 3 sequenza di caratteri alfanumerici, in SQL Server 2008, come segue:

001, 
002, 
..., 
999, 
A01, 
A02, 
..., 
A99, 
B01, 
B02, 
..., 
Z99 

L'elemento successivo nella sequenza viene generata da una stored procedure e conservati in una colonna della tabella NCHAR(3).

Answer 1

Per ottenere la sequenza successiva è possibile aggiungere un Id come

WITH seq AS 
(
    SELECT 
     ROW_NUMBER() OVER (ORDER BY x.alpha + y.number + z.number) AS Id, 
     CONVERT(nchar(3), x.alpha + y.number + z.number) AS Result 
    FROM 
     (
      VALUES 
      ('0'), ('1'), ('2'), ('3'), ('4'), ('5'), ('6'), ('7'), ('8'), ('9'), 
      ('A'), ('B'), ('C'), ('D'), ('E'), ('F'), ('G'), ('H'), ('I'), ('J'), 
      ('K'), ('L'), ('M'), ('N'), ('O'), ('P'), ('Q'), ('R'), ('S'), ('T'), 
      ('U'), ('V'), ('W'), ('X'), ('Y'), ('Z') 
     ) x(alpha), 
     (
      VALUES 
      ('0'), ('1'), ('2'), ('3'), ('4'), ('5'), ('6'), ('7'), ('8'), ('9') 
     ) y(number), 
     (
      VALUES 
      ('0'), ('1'), ('2'), ('3'), ('4'), ('5'), ('6'), ('7'), ('8'), ('9') 
     ) z(number) 
    WHERE 
     NOT (NOT x.alpha BETWEEN '1' AND '9' AND y.number = '0' AND z.number = '0') 
) 
-- Uncomment to see all results 
--SELECT * FROM seq 

SELECT Result FROM seq WHERE Id = (SELECT Id + 1 FROM seq WHERE Result = 'Z01') 

Risultato

Z02 

conteggio completo = 3573 = 999 + (26 * 99)

Answer 2

Un altro approccio per la vostra la stored procedure proposta consisterebbe nell'utilizzare CROSS JOINs come suggerito da @ user2864740 e avere un parametro chiamato @pLastUsed. L'SP quindi restituisce il successivo nella sequenza. NB Funzionerà per tutte le versioni di SQL Server.

CREATE PROCEDURE NextID 
    @pLastUsed CHAR(3) 
AS 
/* Usage 
EXEC NextID 'J64' 

*/ 
BEGIN 
    SET NOCOUNT ON; 
    DECLARE @T1 TABLE (Col CHAR(1)) 
    DECLARE @T2 TABLE (Col CHAR(1)) 
    DECLARE @T3 TABLE (Col CHAR(1)) 
    INSERT @T1 (Col) SELECT '0' UNION ALL SELECT '1' UNION ALL SELECT '2' UNION ALL SELECT '3' UNION ALL SELECT '4' 
           UNION ALL SELECT '5' UNION ALL SELECT '6' UNION ALL SELECT '7' UNION ALL SELECT '8' 
           UNION ALL SELECT '9' UNION ALL SELECT 'A' UNION ALL SELECT 'B' UNION ALL SELECT 'C' 
           UNION ALL SELECT 'D' UNION ALL SELECT 'E' UNION ALL SELECT 'F' UNION ALL SELECT 'G' 
           UNION ALL SELECT 'H' UNION ALL SELECT 'I' UNION ALL SELECT 'J' UNION ALL SELECT 'K' 
           UNION ALL SELECT 'L' UNION ALL SELECT 'M' UNION ALL SELECT 'N' UNION ALL SELECT 'O' 
           UNION ALL SELECT 'P' UNION ALL SELECT 'Q' UNION ALL SELECT 'R' UNION ALL SELECT 'S' 
           UNION ALL SELECT 'T' UNION ALL SELECT 'U' UNION ALL SELECT 'V' UNION ALL SELECT 'W' 
           UNION ALL SELECT 'X' UNION ALL SELECT 'Y' UNION ALL SELECT 'Z' 
    INSERT @T2 (Col) SELECT '0' UNION ALL SELECT '1' UNION ALL SELECT '2' UNION ALL SELECT '3' UNION ALL SELECT '4' 
           UNION ALL SELECT '5' UNION ALL SELECT '6' UNION ALL SELECT '7' UNION ALL SELECT '8' 
           UNION ALL SELECT '9' 
    INSERT @T3 (Col) SELECT '0' UNION ALL SELECT '1' UNION ALL SELECT '2' UNION ALL SELECT '3' UNION ALL SELECT '4' 
           UNION ALL SELECT '5' UNION ALL SELECT '6' UNION ALL SELECT '7' UNION ALL SELECT '8' 
           UNION ALL SELECT '9' 
    SELECT TOP 1 
    t1.Col + t2.Col + t3.Col 
    FROM 
    @T1 t1 
    CROSS JOIN @T2 AS t2 
    CROSS JOIN @T3 AS t3 
    WHERE 
    t1.Col + t2.Col + t3.Col > @pLastUsed 
    ORDER BY 
    t1.Col + t2.Col + t3.Col 
END 
GO 

Answer 3

Condivisione di un esempio per generare il numero sequenza alfanumerico in SQL Server.

For more reference, You can visit this article.

Crea tabella di esempio:

CREATE TABLE dbo.tbl_TestVarcharSequence 
(
    VarcharID VARCHAR(10) 
    ,Name VARCHAR(255) 
    ,CONSTRAINT pk_tbl_TestVarcharSequence_VarcharID PRIMARY KEY(VarcharID) 
) 
GO 

Creare un oggetto campione Sequenza:

CREATE SEQUENCE dbo.seq_TestVarcharSequenceNumber AS 
INT START WITH 1 
INCREMENT BY 1; 
GO 

creare il vincolo sequenza usando FORMATO f unzione:

ALTER TABLE dbo.tbl_TestVarcharSequence 
ADD CONSTRAINT seq_tbl_TestVarcharSequence_VarcharID DEFAULT 
FORMAT((NEXT VALUE FOR dbo.seq_TestVarcharSequenceNumber),'ABC00#') 
FOR VarcharID; 
GO 

inserire i record pochi campioni:

INSERT INTO dbo.tbl_TestVarcharSequence (Name) 
VALUES ('Anvesh'),('Alex'),('Roy'),('Bony') 
GO 

Il Risultato:

SELECT * FROM dbo.tbl_TestVarcharSequence 

ABC001  Anvesh 
ABC002  Alex 
ABC003  Roy 
ABC004  Bony