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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.

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MySQL: Why queries with subqueries are much faster than single query?

2) why mysql optimizer can't do such optimalization on it's own. 3) Where is my mistake? Wrong query? Wrong mysql configuration? … Mysql: Ver 5.5.34-32.0-log for Linux on x86_64 (Percona Server (GPL), Release 32.0) Server: debian based, ssd disks, 128GB ram. …
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1 vote
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MySQL: Why queries with subqueries are much faster than single query?

I did an upgrade to percona mysql 5.6 and it solves a problem. Both type of queries runs equally. Fortunately - equally fast. …
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