In this post, you’ll learn more about the Oracle ErrorPLS-00624: USING clause must be used with either aggregate or pipelined functions with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
PLS-00624: USING clause must be used with either aggregate or pipelined functions
Reason for the Error PLS-00624: USING clause must be used with either aggregate or pipelined functions
USING clause cannot be used with functions that are not declared with AGGREGATE or PIPELINED properties.
How to fix the Error PLS-00624: USING clause must be used with either aggregate or pipelined functions ?
You can fix this error in Oracle by following the below steps
Define function body in PL/SQL or some other language (using external callout call specification).