Auto increment of a field in sql server

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In SQL server database table RentMachine have a column Asset datatype varchar(12).
The requirement is that when user click a dropdown then the next max no of Asset will be shown in a textbox.
Suppose In database the max Asset No is RENT-001.
when user click the dropdown then RENT-002 will be shown in a textbox.
Please help me. Advance thangs.

Posted 30-Nov-14 23:37pm

Sumon562

Updated 30-Nov-14 23:51pm

Shweta N Mishra

v2

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Shweta N Mishra · Answer 1 · 2014-11-30T23:50:00

Create a Identity column in your table and append that with your Fixed character RENT

as below

SQL

CREATE TABLE t1 
(
 c1 int identity(1,1),
 c2 char(3)
);
GO
INSERT INTO t1 VALUES ('2'), ('37'),('597');
GO
SELECT 'RENT' +REPLICATE('0', 3 - LEN(c1)) + convert(varchar(10),c1) AS 'Varchar Column'
FROM t1;

King Fisher · Answer 2 · 2014-11-30T23:50:00

Solution 1

Quote:
Auto increment of a field in sql server

Try this :

SQL

create table  #test
(
Id int identity(1,1),
Pid as case  len(Id) when 1 then 'RENT-'+'00'+convert(varchar,ID)
when 2 then 'RENT-'+'0'+convert(varchar,ID)
else 'RENT-'+convert(varchar,ID)
end
)

INSERT INTO #test DEFAULT VALUES
INSERT INTO #test DEFAULT VALUES
select *From #test

Posted 30-Nov-14 23:50pm

King Fisher

Comments

Sumon562 1-Dec-14 6:16am

Thank you Me. King Fisher for your kind response.Can you please tell me how can I do it in c#.

King Fisher 1-Dec-14 6:39am

you could use Dropwown selectedIndex_changed Event .