Oracle: ORA-01818 Error Message

ORA-01818 Error Message

Learn the cause and how to resolve the ORA-01818 error message in Oracle.

Description

When you encounter an ORA-01818 error, the following error message will appear:

• ORA-01818: HH24 precludes use of meridian indicator

Cause

You tried to reference a date value using both the 24 hour indicator (hh24) and the meridian indicator (AM or PM).

Resolution

The option(s) to resolve this Oracle error are:

Option #1

Correct the date by using either the 24 hour indicator (hh24) or the meridian indicator (AM or PM).

For example, if you tried to execute the following statement:

SELECT TO_DATE('2004/11/24 14:00:00 PM', 'yyyy/mm/dd hh24:mi:ss AM')
FROM dual;

You would receive the following error message:

You could resolve this error by removing one of the hour indicators.

If you wished to use the 24 hour indicator, you could correct the SQL as follows:

SELECT TO_DATE('2004/11/24 14:00:00', 'yyyy/mm/dd hh24:mi:ss')
FROM dual;

If you wished to use the meridian indicator (AM or PM), you could correct the SQL as follows:

SELECT TO_DATE('2004/11/24 2:00:00 PM', 'yyyy/mm/dd hh:mi:ss PM')
FROM dual;