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postgres queries -- need opinions

Generally speaking, it is better to make lots of frequent queries on a db (that pull a small amount of data), or less frequent queries on the db (that pull a large amount of data).   I don't want to overload anything, or lock anyone out...  I am not an expert by any means with databases, so, for my benefit, please keep discussion at a high level.  Thanks!!
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MarkLoveExEx
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MarkLoveExEx
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Pawan KumarDatabase ExpertCommented:
If your queries fetching small amount of data then it is good but sometimes we have fetch large data also depending on the requirement.

The whole idea should be like the queries should take optimal time to return that data. and the health of the Db should be good.
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