Learn the reason and how to resolve the ORA-01722 error message in Oracle.
Description
When you stumble upon an ORA-01722 error, the following error message will appear:
ORA-01722: invalid number
Cause
You executed a SQL statement that tried to convert a string to a number, but it was once unsuccessful.
Resolution
The option(s) to resolve this Oracle error are:
Option #1
Only numeric fields or persona fields that include numeric values can be used in arithmetic operations. Make certain that all expressions evaluate to numbers.
Option #2
If you are including or subtracting from dates, make positive that you added/substracted a numeric fee from the date.