Hi,
I'd be happy to help you out with your question. Sorry for the inconvenience caused.
The error message "ORA-01843: not a valid month" usually occurs when converting a string to a date using the TO_DATE function, but the format of the string is not recognized as a valid date format.
In your query, it seems that the issue may be with the format of the a_start_date and a_end_date parameters that you are trying to convert to a date using the TO_DATE function with the 'MM/DD/YYYY' format mask. If the format of the parameters does not match the specified format mask, then the TO_DATE function will throw the "not a valid month" error.
To resolve the issue, you should ensure that the format of the a_start_date and a_end_date parameters matches the 'MM/DD/YYYY' format mask. Alternatively, you can use the TO_DATE function with a specific date format mask that matches the format of the parameters to avoid any errors or ambiguity.
For example, you can modify the query to use the following format for the TO_DATE function:
TO_DATE(:a_start_date,'MM/DD/YYYY')
This will ensure that the parameter is converted to a date with the correct format and avoid any "not a valid month" errors.
If you have any other questions or need assistance with anything, please don't hesitate to let me know. I'm here to help.
If the reply was helpful, please don’t forget to upvote or accept as answer, thank you.