1. ORA-00904
- Description:
Invalid identifier.
- Solution: Check
for typos in column or table names.
2. ORA-12154
- Description: TNS:
could not resolve the connect identifier specified.
- Solution: Verify
the correctness of the TNS entry in the connection string.
3. ORA-01017
- Description:
Invalid username/password; logon denied.
- Solution:
Double-check and provide the correct username and password.
4. ORA-00942
- Description:
Table or view does not exist.
- Solution: Ensure
the table or view exists and the name is spelled correctly.
5. ORA-12514
- Description: TNS:
listener does not currently know of the service requested in connect
descriptor.
- Solution: Verify
the database service name and ensure the listener is running.
6. ORA-02291
- Description:
Integrity constraint violated.
- Solution: Resolve
issues with foreign key constraints.
7. ORA-04030
- Description: Out
of process memory.
- Solution: Adjust
memory parameters or investigate memory usage.
8. ORA-01403
- Description: No
data found.
- Solution: Handle
the no-data-found condition in PL/SQL code.
9. ORA-01722
- Description:
Invalid number.
- Solution: Check
for data type mismatches in numeric operations.
10. ORA-12170
- Description:
TNS: connect timeout occurred.
- Solution: Check
network connectivity and adjust timeout settings.
11. ORA-06512
- Description: At
line nnn.
- Solution:
Identify and fix errors at the specified line in PL/SQL code.
12. ORA-04088
- Description:
Error during execution of trigger.
- Solution: Review
and fix errors in the trigger code.
13. ORA-01422
- Description:
Exact fetch returns more than requested number of rows.
- Solution: Refine
queries to fetch a single row.
14. ORA-01031
- Description:
Insufficient privileges.
- Solution: Grant
the necessary privileges to the user.
15. ORA-01843
- Description: Not
a valid month.
- Solution: Check
date formats in SQL queries.
16. ORA-00911
- Description:
Invalid character.
- Solution:
Correct syntax errors in SQL statements.
17. ORA-02292
- Description:
Integrity constraint violated - child record found.
- Solution: Ensure
foreign key constraints are satisfied.
18. ORA-04021
- Description:
Timeout occurred while waiting to lock object.
- Solution:
Investigate and address lock contention issues.
19. ORA-01400
- Description:
Cannot insert NULL into.
- Solution:
Provide a non-NULL value for the column.
20. ORA-01000
- Description:
Maximum open cursors exceeded.
- Solution: Close
unused cursors or increase OPEN_CURSORS parameter.
