durus | An persistent object database for Python

 by   nascheme Python Version: Current License: Non-SPDX

kandi X-RAY | durus Summary

kandi X-RAY | durus Summary

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An persistent object database for Python
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            durus Key Features

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            durus Examples and Code Snippets

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            Community Discussions

            Trending Discussions on durus

            QUESTION

            TSQL Subquery filter to performance problem
            Asked 2019-Aug-19 at 05:24

            I'm working on this query. When I assign a date filter from subquery to main query, the response time increases from 1 second to 4.5 minutes.

            I don't know how to solve this problem and fix my query. I'm writing the query and the methods I've tried.

            Thank you for your help.

            My query:

            ...

            ANSWER

            Answered 2019-Aug-19 at 05:24

            Common ways to optimize:

            1) remove calculations from the left in filters

            2) render subqueries in separate temporary tables or in intermediate CTE queries

            3) do not use table variables

            4) in the early stages try to filter as much data as possible before connections

            Source https://stackoverflow.com/questions/56940073

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