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Results tagged with mysql
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user 73264
All versions of MySQL (not Microsoft SQL Server). Please also add a version-specific tag like mysql-5.7 if that is relevant to the question.
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 …
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