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Results tagged with query-performance
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user 8367
For questions about improving the performance and/or efficiency of database queries.
0
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2
answers
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How can one calculate percentage from previous week in aggregate query?
I have a challenge I set out to do that seemed initially trivial. Not so for my developper brain.
Consider the following simple view, used to validate a cron I wrote that queries a subset of 200 000 …
- 115
0
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0
answers
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Optimise multiple inner JOIN
Consider the following query:
mysql> SELECT GROUP_CONCAT(a.id SEPARATOR '\n')
-> FROM assignment a
-> INNER JOIN statements s ON a.id = s.assignment_id
-> INNER JOIN assignment_status_lo …
- 115