How to calculate sum of row

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How to calculate sum of row

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Jeff Moden SSC Guru Points: 1004403 More actions · Answer 1

Understood, but not exactly what I meant... I meant what they do behind the scenes to generate the running total... must be a "machine language" cursor of sorts to get some speed out of it.

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

Jeff Moden SSC Guru Points: 1004403 More actions · Answer 2

Carla Hepker (8/4/2008)
Jumping in...
I assume each debit and credit is associated with a user identifier and has a post date time stamp. If that is the case, it seems to me that you should be able to do a view, grouping by the user identifier where you subtract the sum of the credits from the sum of the debits. You could get a point in time balance by including an ending date in a where clause.

Yep.. I agree... point in time balances are just a SUM limited by criteria and no "triangular join" is involved. Running balances on each row is a bit different. You mentioned a view for this... I'd love to see someone do it in a view without the use of a performance killing "triangular join". Not being a smart guy about this, either. It would be revolutionary if someone could actually pull it off. 🙂

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)