Incremental Number

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Incremental Number

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Sean Lange

Posted Friday, November 30, 2012 3:12 PM

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sasansamani (11/30/2012)

SELECT DMax("[AssetNumber]","Waste Hauler Number","+1") AS Expr1 FROM [Waste Hauler Number];

I am getting two 4001. What I am doing incorrectly?

The last parameter is the criteria (it acts like a where clause). "+1" is not valid there.

Personally I hate those built in functions. I find them obtuse and difficult to read.

I would write that as a query instead.

select MAX(AssetNumber) + 1 from [Waste Hauler Number]

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Post #1391572

sasansamani

Posted Friday, November 30, 2012 3:20 PM

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thank you very much. It works now.

I tried to use something simlar to that.

Post #1391574

Sean Lange

Posted Friday, November 30, 2012 3:30 PM

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You're welcome. Glad that worked for you.

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Post #1391577

ProofOfLife

Posted Saturday, December 01, 2012 3:30 AM

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Hi

My apologies for not being able to contribute to this earlier - I'm fairly certainthat I am in a different time zone to you.

If you are wanting to do this in an Access query, then you could use a LEFT OUTER join. Join the table with the incrementing number to the table you wish to check via the two number attributes, then set the join type to the left outer join option (2).

If you create a test query in this way (Important Note: drag your join from the table with the incrementing number to the table you wish to check) and simply add the two attribute, you will see matching numbers where you have used the number and the incrementing number and a null in the cases where the numbers haven't been used.

Taking this a step further, add a null criteria for the attribute in the table you are checking, and you will be returned a set of numbers that haven't been used. You could then use this as a subquery for generating the next unused number by changing the query to a group (aggreagte) query and use the min option.

Cheers

Rowan

Post #1391638

sasansamani

Posted Saturday, December 01, 2012 4:01 PM

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thank you everyone

Post #1391675

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