Subject Re: [firebird-support] How to add previous column value to current value?
Author Dimitry Sibiryakov
29.03.2016 11:40, 'Piotr Olszewski' piotr.olszewski@... [firebird-support] wrote:
> I need to get a date difference (days between) between rows.

With Firebird 3.0 you can use window function LAG.

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WBR, SD.