One Query, Four Dialects: Differences Between SQL Server, PostgreSQL, MySQL and SQLite
The same Bookstore queries give different syntax and different results on SQL Server, PostgreSQL, MySQL and SQLite: in MySQL || is an OR and 7 / 2 is 3.5000, and PostgreSQL is case-sensitive. We compare paging, string concatenation, identity and RETURNING, upserts, date functions, quoting, booleans, NULL ordering and LATERAL on four engines with real output.
8 Nov 2026
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14 min
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5
