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Shopping Cart Unique OrderNumber?

Posted on 2006-07-12
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Last Modified: 2013-11-29
Here's a good Shopping Cart question to bennifit many who are stuck using random OrderNumbers.

I need to select the largest OrderNumber from one table, increment 1, then insert the new larger number into a second table

Q. How can I combine the two seperate SQLs below into one classy and usefull SQL?


SELECT 1+ MAX(col_OrderNumber) FROM FirstTable

INSERT INTO SecondTable (col_OrderNumber, col_FirstName, col_LastName)
                           VALUES ( '" OrderNumber,'" + FirstName.ToString() + "', '" + LastName.ToString() + "')
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Question by:kvnsdr
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Lowfatspread earned 1000 total points
ID: 17096619
either use an identity column on table 2
or continue as you are ....

you normally will need to use the order number many times so have to "capture" it once via a select anyway...





alternative is
SELECT 1+ MAX(col_OrderNumber) FROM FirstTable

INSERT INTO SecondTable (col_OrderNumber, col_FirstName, col_LastName)
SELECT 1+ MAX(col_OrderNumber),'firstnamevalue','lastnamevalue'  FROM FirstTable
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