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PostgreSQL subqueries explained with simple examples

PostgreSQL subqueries allow one SQL query to run inside another, making it possible to solve filtering, aggregation, comparison, and table based problems without writing separate queries. The lesson ...

5 Points to Check First When SQL Is Slow: How to Improve Execution Plans, Indexes, and JOINs

When you execute an SQL query, the results do not return quickly.You may have had no issues during development, but the ...
Linux Journal

MariaDB/MySQL, PostgreSQL and SQLite3 - Comparing Command-Line Interfaces

Don't be afraid of using your chosen database's command-line client. I might as well say this up front: I don't like using GUI (aka non-command-line or graphical) tools with my databases. This is ...
iMasters

Cinco palavras do SQL que fazem o PostgreSQL trabalhar mais do que o necessário

Benchmark com 2 milhões de linhas mostra o custo real de UNION, MATERIALIZED, ORDER BY random() e SELECT * no PostgreSQL 18.6 ...