22 окт. 2015 г. · It generally won't make any difference, because they should result in the same query plan. At least, an EXISTS subquery will; ...

14 июн. 2021 г. · In terms of performance, when comparing these two queries, which one should be more efficient? select d.list_name, d.date_created,d.price p.name ...

5 апр. 2010 г. · PostgreSQL can rewrite a subquery to a join or a join to a subquery when it thinks one is faster than the other. It all depends on the data, ...

12 июл. 2019 г. · So why LEFT JOIN ing function is significantly slower in compare to SubQuery ? Is there a way to make LEFT JOIN take time equally to SubQuery ?

30 мая 2020 г. · These do different things. The equivalent of the first query is a left join, not an inner join. And then they are only equivalent if you can ...

6 февр. 2024 г. · The view being joined is fairly complex, and relies on some sub-views as well, but when executed in isolation it's very fast.

4 окт. 2010 г. · I would EXPECT the first query to be quicker, mainly because you have an equivalence and an explicit JOIN. In my experience IN is a very slow operator.

26 июл. 2012 г. · If my data continues to grow this way, will my joins query get faster or both tests will load slower? I have indexes on all join points and ...

14 сент. 2018 г. · I have a subquery that I couldn't replace by join and be able to test its performance. Assume that you have a price history table, you add ...

16 февр. 2015 г. · A LATERAL join is more like a correlated subquery, not a plain subquery, in that expressions to the right of a LATERAL join are evaluated once for each row ...