ORA-01843 Error Message
Learn the cause and how to resolve the ORA-01843 error message in Oracle.
Description
When you encounter an ORA-01843 error, the following error message will appear:
- ORA-01843: not a valid month
Cause
You entered a date, but the month portion of the date was not a valid month.
Resolution
The option(s) to resolve this Oracle error are:
Option #1
Re-enter the date value using either a MONTH format mask.
The valid values for month are:
- January
- February
- March
- April
- May
- June
- July
- August
- September
- October
- November
- December
Or you could use the MON format mask and use one of the following values:
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
If all else fails, you may want to consider using the TO_DATE function and specifying the date format mask.
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