SQL

UPDATE

DestructiveUpdate rows

UPDATE <table> SET ... WHERE ...;

Updates rows matching a condition; a missing WHERE updates every row.

Examples

  • UPDATE users SET active=0 WHERE last_login<'2025-01-01';Disable stale users

Syntax

UPDATE <table> SET <col>=<val> WHERE <cond>;

Before you run it

Without WHERE, all rows change; always verify.

Related commands

Check it once more before you run it

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