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Use interval and date_trunc to make working with SQL dates easier.
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How to find the oldest or most recent record associated with a particular foreign key.
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Write queries that combine data from multiple sources.
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What do you do when indexes aren’t enough?
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Take a guided tour through a query plan for a “simple” SQL query.
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Improve query performance by using the right index type.
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Database views can improve the performance, composability, and readability of
your rails application and Scenic is here to help.
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Improve the speed of Postgres full-text search by introducing a tsvector column to cache lexemes and using a trigger to keep the lexemes up-to-date.
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What is referential integrity and why is it important to your Rails apps?
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Take your queries to the next level with window functions.