NVL - Oracle SQL Null Field Handling

An often overlooked function that comes in very handy is the NVL function in Oracle. This allows you to replace a query result that returned NULL, with a value, such as 0. Here is the syntax:

SELECT NVL(fielda, 0) FROM table;

This will always give you either a value or a "0". This will never return a NULL.

Here is a link for further details on this function:

NVL Function