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ORA-00900: Invalid SQL statement

What it means

The text sent is not a SQL statement Oracle recognises, for example a SQL*Plus command (DESC, SET, SPOOL, EXEC) sent through JDBC or EXECUTE IMMEDIATE.

How to fix it

Run client commands only in SQL*Plus/SQLcl; in code use a PL/SQL call BEGIN proc; END; instead of EXEC proc.

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.