Why should you care?

Production outages and slow systems are diagnosed with privileges knowledge — not guesswork.

See it live — copy this example

Run these statements in SQL Developer or SQL*Plus against your lab PDB. Prefer a practice user — not SYS — for application SQL.

GRANT SELECT, INSERT ON customers TO app_user;
REVOKE INSERT ON customers FROM app_user;

SELECT * FROM user_tab_privs;

What happened?

• Object privileges control who can SELECT/INSERT/UPDATE/DELETE specific tables.
• Follow the steps below — typing the code yourself is the fastest way to learn.

Practice next

1. Connect to your lab as a user with the needed privileges.
2. Run the read-only checks first.
3. Write the definition of this topic in your own words.
4. Change one literal in the example and re-run.
5. Write a second example from memory without looking.

Remember

You can explain Privileges in plain English. You ran at least one related command or query. You know one real system where it matters.

Privileges on a banking PDB

On-call DBA reviews privileges during a health check before peak traffic.

Outcome: You know which view/command to open first.