Store Procedure To Generate Unique ID

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Sir/Madam
I have a Web Application in Asp.Net With My Sql Server 2008 .

Question: I want to Generate Unique Id Like Current Year Current Month Current Date With 0000 -9999 Number. Example 201310260001
it should be autoincrement .. any solution will be appreciate and this will be done with Store Procedure. When user submit form then that procedure will check the last id and increment with one 201310260002

Thanks In Advance

Posted 26-Oct-13 5:24am

Mohammad Nawaz

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Mike Meinz 26-Oct-13 12:05pm

Two options

1. Use IDENTITY(1,1) on the primary key column in the table that will store the data? See Scope_Identity in SQL Server documentation.

2. Use SQL Server Sequence Class if your version of SQL Server supports it.

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Mehdy Moini · Answer 1 · 2013-10-26T07:34:00

Also you can use unique identifier ,but be noted this is not optimize ever! as it creates a unique value in all the world so it is larg!

SQL

CREATE TABLE myTable (ColumnA uniqueidentifier DEFAULT NEWSEQUENTIALID())

and for insertion:

SQL

insert into myTable(ColumnA) values(NEWID())

for more information check the links:
http://technet.microsoft.com/en-sg/library/ms189786.aspx[^]
http://technet.microsoft.com/en-sg/library/ms190348.aspx[^]

S. M. Ahasan Habib · Answer 2 · 2013-10-26T18:27:00

i guess the following code will fulfill your requirement. It will generate and increase id based on date and store it to table named #MyTable. Please check and test the code. I tested and found ok with your requirement

SQL

create table #MyTable(Id bigint, Name varchar(100));
go

create proc [dbo].[InsertMaxValue]
as
begin
    
	declare @IdGenByCurrentDate bigint = (select cast(year(getdate()) as varchar) + cast(month(getdate()) as varchar) + + cast(day(getdate()) as varchar));
	declare @LastId bigint = (select max(id) from #MyTable);
	declare @NewId bigint = cast(@IdGenByCurrentDate as varchar(100)) + '0001';

	if @LastId is not null	
	begin
		declare @LastIdGenByCurrentDate bigint = substring(cast(@LastId as varchar(100)), 1, len(@IdGenByCurrentDate));

		if @IdGenByCurrentDate = @LastIdGenByCurrentDate		
			set @NewId = @LastId + 1;			
	end
	insert into #Mytable(Id,Name) values (@NewId, cast(getdate() as varchar(111)));
end

exec InsertMaxValue

select * from #MyTable

Store Procedure To Generate Unique ID

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