Question

Inside my SQL Server database I got this as my ID for example SSK0000001.

I want it to auto-increment in my system and also the last number of ID e.g.”1″ (after another new record it will become SSK0000002) is update in my SQL Server database.

I know it can be done with set auto-increment inside database but now my ID is nchar.

Anyone could help will be appreciate.

Answer 1

You can cast right side to int and increment:

declare @next int
select @next = convert( int, right( max( id ), 7 ) )  + 1
from your table 

then insert as:

insert into ... (Id, ...)
values (   'SDK' + right( '0000000' + rtrim(ltrim( str( @next ) ) ), 7 ), ... )

But this is the most dirty solution as you can take:

• This cause a lot of database locks (because aggregation function)
• Slowest than autoincrement
• Lot of code to keep.

I suggest to you to move to an autoincrement data type