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New posts in query-optimization

Mysql optimization for REGEXP

MySQL indexes - what are the best practices according to this table and queries

Is storing counts of database record redundant?

select top 10 ... and select top 30 follows different execution plan

Disable spark catalyst optimizer

MySQL - Views - Super slow query

Mysql improve SELECT speed

Getting rid of "Using temporary; Using filesort"

SQL magic - query shouldn't take 15 hours, but it does

Query with ORDER BY is 13 times as slow when I add LIMIT 1

Optimize SQL that uses between clause

Role of selectivity in index scan/seek

SQLite3 query optimization join vs subselect

How to know which count query is the fastest?

RethinkDB - Find documents with missing field

Optimal query to fetch a cumulative sum in MySQL

How do you fix queries that only run slow until they're cached

Why query optimizer selects completely different query plans?

Does the order of columns in a query matter?