How do I insert a new record to SQL dbase with unique, prenumbered Reference Key?

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Hi all. I have to insert an Orders form where I have to insert fields like Order_Num, Order_Date, Product_ID, Order_Amount, etc... My problem is that the Order_Num (which is the record ID) is preformatted like this: <P1109-0001> where:

VB

"P" constant character (PurchaseOrder); "11" is the current year '2011'; "09" is the current month (Sept); "-" is constant character (separator); "0001" is the series number.

This series number increments whenever a new record is saved to the SQL table "Orders table".

In VB6, I am able to loop through the table to search for a duplicate ID and when there is no duplicate, the record with that ID is inserted.

Can you please guide me on how to do it in VB.net? I am not also familiar with stored_proc in SQL so I usually code using VB.

Thanks in advance.

Posted 14-Sep-11 1:05am

josh1nine

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Wayne Gaylard · Answer 1 · 2011-09-14T01:39:00

Solution 1

You should have another table in the database that stores your series number. Then you can just retrieve this number whenever you want to insert a new purchase order, create your unique id, increment the series number and save all to database.

Hope this helps

Posted 14-Sep-11 1:39am

Wayne Gaylard

sachin10d · Answer 2 · 2011-09-14T02:14:00

store procedure takes the tablename, columnname as input parameter and retruns the next number
Employee table will return output as E11090001

SQL

create proc GetNextNumber
@tableName nvarchar(100),
@columnName nvarchar(100)
as
declare @strSql nvarchar(1000)
set @strSql = ' select ''' + upper(right(@tableName,1)) + ''' + 
		left(convert(nvarchar,GETDATE(),12),4) + 
		right(''0000'' + convert(nvarchar,max(right(' +@columnName + ',4))+ 1),4) 
	from ' + @tableName
exec sp_executesql  @strsql

josh1nine · Answer 3 · 2011-09-14T15:56:00

Solution 3

Hi Wayne, the series number resets to zero when the Year or the Month changes. For example, the Orders record <P1108-0326>

VB

(2011-Aug, series# 326)

will be expected to set to P1109-0001 once the date changes to September 01 (2011-Sep-01).

Posted 14-Sep-11 15:56pm

josh1nine

josh1nine · Answer 4 · 2011-09-14T16:06:00

Solution 4

hi sachin10d, I will try this procedure. However, I have to study how to call SQL storedproc in dotNet. Thanks.

Posted 14-Sep-11 16:06pm

josh1nine

How do I insert a new record to SQL dbase with unique, prenumbered Reference Key?

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