On Tue, 2021-11-16 at 13:56 +0530, Sanjay Minni wrote: > I need to keep a copy of old data as the rows are changed. > > For a general RDBMS I could think of keeping all the data in the same table with a flag > to indicate older copies of updated / deleted rows or keep a parallel table and copy > these rows into the parallel data under program / trigger control. Each has its pros and cons. > > In Postgres would i have to follow the same methods or are there any features / packages available ?
Yes, I would use one of these methods.
The only feature I can think of that may help is partitioning: if you have one partition for the current data and one for the deleted data, then updating the flag would automatically move the row between partitions, so you don't need a trigger.