Resolving Error ORA-01722: Invalid Number in SSRS Report
In this article, we will discuss how to resolve the ORA-01722 error, which is an invalid number error in SSRS reports when working with SQL queries. This error typically occurs when a query attempts to insert a non-numeric value into a numeric column. To demonstrate how to resolve this issue, we will use the following query as an example:
SELECT e.id, -- other columns
FROM employees e
WHERE e.hire_date >= TO\_DATE(p\_year || '-' || p\_month || '-01', 'YYYY-MM-DD')
Understanding the Error
The ORA-01722 error occurs when a non-numeric value is passed to a numeric column. In the above query, the hire\_date column is a date type, and the TO\_DATE function is used to convert the input parameters p\_year and p\_month into a date format. If the input parameters are not in the correct format, the query will fail and return the ORA-01722 error.
Resolving the Error
To resolve the ORA-01722 error, you need to ensure that the input parameters are in the correct format. You can use the ISDATE function to check if the input parameters are valid dates before passing them to the TO\_DATE function. If the input parameters are not valid dates, you can return an error message or use a default value.
DECLARE
p\_year NUMBER := &p\_year;
p\_month NUMBER := &p\_month;
BEGIN
IF ISDATE(p\_year || '-' || p\_month || '-01') THEN
SELECT e.id, -- other columns
FROM employees e
WHERE e.hire\_date >= TO\_DATE(p\_year || '-' || p\_month || '-01', 'YYYY-MM-DD');
ELSE
DBMS\_OUTPUT.PUT\_LINE('Invalid Number');
END IF;
END;
The ORA-01722 error occurs when a non-numeric value is passed to a numeric column. To resolve this error, you need to ensure that the input parameters are in the correct format. You can use the ISDATE function to check if the input parameters are valid dates before passing them to the TO\_DATE function. If the input parameters are not valid dates, you can return an error message or use a default value.
References
- Oracle ORA-01722: Invalid number (docs.oracle.com)
- ISDATE function in Oracle (techonthenet.com)
- TO\_DATE function in Oracle (docs.oracle.com)