Viewing Trigger Information FAQS

1. How can I see all triggers in my schema?

Use the USER_TRIGGERS view:

SELECT trigger_name, table_name, status, trigger_type

FROM user_triggers;

·        Shows only triggers in your current schema.

2. How can I see all triggers I have access to?

Use the ALL_TRIGGERS view:

SELECT owner, trigger_name, table_name, status

FROM all_triggers;

·        Includes triggers in other schemas that you have privileges to view.

3. How can I see all triggers in the database?

Use the DBA_TRIGGERS view (requires DBA privileges):

SELECT owner, trigger_name, table_name, status

FROM dba_triggers;

·        Shows every trigger in the database along with its owner and status.

4. How do I check if a trigger is enabled or disabled?

SELECT trigger_name, status

FROM user_triggers

WHERE trigger_name = 'TRIGGER_NAME';

·        Status values:

o   ENABLED → Active

o   DISABLED → Inactive

o   INVALID → Has compilation errors

5. How do I find which table a trigger belongs to?

SELECT trigger_name, table_name

FROM user_triggers

WHERE trigger_name = 'TRIGGER_NAME';

·        Database-level triggers may have NULL for table_name.

6. How do I find the type of a trigger?

Use the trigger_type column in the dictionary views:

·        Examples of trigger_type:

o   BEFORE EACH ROW

o   AFTER EACH ROW

o   BEFORE STATEMENT

o   AFTER STATEMENT

SELECT trigger_name, trigger_type

FROM user_triggers;

7. How can I get the trigger’s DDL?

SELECT DBMS_METADATA.GET_DDL('TRIGGER','TRIGGER_NAME') FROM dual;

·        Useful for reviewing logic, backing up, or recreating triggers in another schema.

8. How can I check for invalid triggers?

SELECT trigger_name, status

FROM user_triggers

WHERE status = 'INVALID';

·        Invalid triggers usually occur after schema changes or compilation errors.

9. How can I find triggers on a specific table?

SELECT trigger_name, status

FROM user_triggers

WHERE table_name = 'EMPLOYEES';

·        Replace 'EMPLOYEES' with your table name.

10. What are best practices for monitoring triggers using dictionary views?

·        Regularly check for invalid triggers

·        Document all triggers with purpose and table

·        Keep DDL backups using DBMS_METADATA

·        Monitor database-level triggers for auditing/logon tracking

·        Use ALL_TRIGGERS or DBA_TRIGGERS for cross-schema analysis