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 explainextended.com
MySQL ORDER BY / LIMIT performance: late row lookups at EXPLAIN EXTENDED
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Securities Master Database with MySQL and Python | QuantStart
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| | Securities Master Database with MySQL and Python
| | use-the-index-luke.com
Index INCLUDE Clause: How it works and when to use it
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| | The INCLUDE clause for CREATE INDEX is available in some SQL databases: Microsoft SQL Server, PostgreSQL, and IBM Db2 (LUW)
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Trying to upgrade PowerDNS - required database schema upgrade failed (Column length too big)
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| | An attempted database schema upgrade, required for upgrading old PowerDNS installations, failed due to a MySQL error.
| | www.crunchydata.com
Hacking the Postgres Statistics Tables for... | Crunchy Data Blog
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| Adding extended statistics can add information about how columns are related. Louise has some real life example queries and tips for working with extended table stats that can dramatically improve query performance.