# What Happens to an SQL Query?

DevFeed: [What Happens to an SQL Query?](<https://devfeed.tech/articles/what-happens-to-an-sql-query-34693.md>)

Original publisher: [Read original article](<https://newsletter.systemdesigncodex.com/p/what-happens-to-an-sql-query>)

Author: Saurabh Dashora

Published: 2026-03-04T03:14:28Z

Content type: tutorial

Language: en

Sources: [System Design Codex](<https://devfeed.tech/sources/system-design-codex.md>)

Topics: [SQL](<https://devfeed.tech/topics/sql.md>), [Databases](<https://devfeed.tech/topics/databases.md>), [Parser](<https://devfeed.tech/topics/parser.md>), [syntax](<https://devfeed.tech/topics/syntax.md>)

Tags: [database](<https://devfeed.tech/tags/database.md>), [diagram](<https://devfeed.tech/tags/diagram.md>), [errors](<https://devfeed.tech/tags/errors.md>), [execution](<https://devfeed.tech/tags/execution.md>), [locks](<https://devfeed.tech/tags/locks.md>), [rollback](<https://devfeed.tech/tags/rollback.md>), [sql](<https://devfeed.tech/tags/sql.md>), [syntax](<https://devfeed.tech/tags/syntax.md>)

## AI overview

This tutorial explains how an SQL query moves through a database. It covers transport and access checks, parsing and optimization into an execution plan, execution through the storage engine, and supporting components such as transactions, locks, buffering, and recovery.

## Source excerpt

The Journey Through the DB