When it comes to optimizing query performance, indexing is one of the most powerful tools available to database engineers. Both PostgreSQL and Microsoft SQL Server (or Azure SQL) use B-Tree indexes as their default indexing structure, but the way each system implements, maintains, and uses those indexes varies in subtle but important ways. In this blog post, we explore key areas where PostgreSQL and SQL Server diverge: how their B-Tree indexes implementations behave under the hood and how they…
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