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ORA-01732: Data manipulation operation not legal on this view

What it means

The view is not updatable (DISTINCT, GROUP BY, aggregates, set operators...).

How to fix it

Update the base table, or add an INSTEAD OF trigger to the view.

Catch it before it runs

ORA Error Helper
Explains ORA-/PLS- codes inside JetBrains IDEs and DataGrip.
PL/SQL Lint
Flags risky PL/SQL patterns while you type.
Oracle Plan Reader
Reads execution plans and points at the slow step.
PL/SQL in Practice
Kindle book with practical PL/SQL for working developers.

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Updated 2026-11-12.