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Results tagged with optimization
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user 73264
In the context of a database, optimisation refers to the process of the query optimiser selecting an efficient physical execution plan.
2
votes
How to optimise MySQL query that uses dependent subquery
Instead of using a sub query you could use a LEFT JOIN.
That way you negate the need for a sub query which is being looked at for each image.
LEFT JOIN
seen
ON
seen.image_id = im …
- 21