how to increment varchar in sql server 2008 r2

Question

5.00/5 (1 vote)

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SQL-Server-2008

How to increment varchar in server.

For example:refid0001,refid0002,refid0003

I want to increment values automatically,when i insert records in table

Posted 28-Dec-12 1:45am

maan_k

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3 solutions

Solution 1

Instead of using varchar you can use Int as the column datatype and apply the IDENTITY (Property)[^] which will auto increment the value for you. You can then convert this to Varchar and concatenate the required string.
Here is a sample

SQL

CREATE TABLE #tbUser
(
	UserID INT IDENTITY(1,1),
	UserName VARCHAR(100)
)

INSERT INTO #tbUSer
SELECT 'User1' UNION
SELECT 'User2' UNION
SELECT 'User3' UNION
SELECT 'User4' 


SELECT 'refid' + RIGHT(REPLICATE(0,4) + CAST(UserID AS Varchar),4) AS NewCol,* FROM #tbUser


DROP TABLE #tbUser

Posted 28-Dec-12 1:59am

__TR__

Solution 2

Best way to do that, Create a function DBO.GetSrNo()

SQL

ALTER Function DBO.GetSrNo()
RETURNS nvarchar(10)
as
    Begin
        Declare @C_No as int , @val as nvarchar(5)
        SET @C_No = (Select COUNT(*)+1  from T2)
        SET @val = CONVERT(nvarchar(10), (SELECT SUBSTRING('0000',Len(@C_No),Len('0000')-Len(@C_No))) + convert (nvarchar(10),@C_No))

        Return @val
    End

After that create a table and set DBO.GetSrNo() function as default. So It will be fill automatically.

SQL

CREATE TABLE [dbo].[T2](
    [DOC_NO] [nvarchar](20) NULL,
    [E_NAME] [nvarchar](50) NULL
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[T2] ADD  CONSTRAINT [DF_T2_DOC_NO]  DEFAULT ([DBO].[GetSrNo]()) FOR [DOC_NO]
GO

When you insert ...

SQL

INSERT INTO T2 (E_NAME) values ('VIJAY')
INSERT INTO T2 (E_NAME) values ('VINOD')
INSERT INTO T2 (E_NAME) values ('AJAY')

Output

SQL

SELECT * FROM T2

DOC_NO E_NAME
---------- --------
0001 VIJAY
0002 VINOD
0003 AJAY

I hope u like this ...Happy New Year ... wish u good luck .. :)

Regards,
Vijay

Posted 28-Dec-12 2:38am

P.S Vijay

Comments

Member 10000951 11-Jul-16 3:13am

Good...............,Thanks Vijay nice post,really helps for me

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Aarti Meswania · Accepted Answer · 2012-12-28T02:43:00

Method #1
you can not auto incr varchar column
make a integer column and set it autoincr while you want to display,
use query as below...

SELECT 'refid' + RIGHT(REPLICATE(0,4-len(Id)) + convert(varchar,Id) from tblnm

------------------------------OR------------------------------

Method #2
Create functions that can increment varchar with 1

write query

SQL

--insert query
insert into tbl(id) select (select dbo.incr(max(id)) from tbl)

--simple select query
select dbo.incr('refid0002')
--o/p = refid0003

create function

SQL

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[ParseValues]
(@String varchar(8000), @Delimiter varchar(10) )
RETURNS @RESULTS TABLE (ID int identity(1,1), Val varchar(50))
AS
BEGIN
    DECLARE @Value varchar(100)
    WHILE @String is not null
    BEGIN
        SELECT @Value=CASE WHEN PATINDEX('%'+@Delimiter+'%',@String) >0 THEN LEFT(@String,PATINDEX('%'+@Delimiter+'%',@String)-1) ELSE @String END, @String=CASE WHEN PATINDEX('%'+@Delimiter+'%',@String) >0 THEN SUBSTRING(@String,PATINDEX('%'+@Delimiter+'%',@String)+LEN(@Delimiter),LEN(@String)) ELSE NULL END
        INSERT INTO @RESULTS (Val)
        SELECT @Value
    END
RETURN
END

Create this function also

SQL

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
--select dbo.Incr('refid0002')
ALTER FUNCTION [dbo].[Incr]
(
	@a varchar(max)
)
RETURNS varchar(max)
AS
BEGIN
	select @a=val from [dbo].[ParseValues](@a,'refid')
	select @a= convert(varchar,(convert(numeric,@a)+1))
	select @a= 'refId' + replicate('0',4-len(@a)) + @a
	return @a
END

Happy Coding!
:)