Luis Cazares (10/27/2015)

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This looks very similar to a running total problem (except that there's no total). This can be managed by the quirky update, a cursor or a triangular join....

Sean Lange (10/27/2015)

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David 76709 (10/27/2015)

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Thank you.

That doesn't quite do it. I am still getting a NULL where the values of date_serial are not present in both tables:

date_serial ...

Thank you.

That doesn't quite do it. I am still getting a NULL where the values of date_serial are not present in both tables:

date_serial ...