Running total in SQL

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Using a correlated subquery to produce a running total (or running balance) column.
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Best explanation I've ever seen, thank you !

vgeniirshf
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Nice explanation, example. Thank you Sir..

deepakm
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I understand clearly but how do you update your table with a running total provided it was ordered

hobee
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Thank you for sharing this video which gives me the idea to achieve my software feature. 👍

weilai
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Yes this works unless you want to order by date and then you have problems. So you can switch your id parts to date, but then the problem is if you have two entries with the same date. So this is where I am stuck

Asimov
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Great videos - thanks for sharing.

In this case you could also use a WINDOW function like this:

SELECT id, amt, sum(amt) OVER (ORDER BY id) FROM ledger;

philbartie
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