What is the best way to convert an int or null to boolean value in an SQL query?

Question

What is the best way to convert an int or null to boolean value in an SQL query, such that:

• Any non-null value is TRUE in the results
• Any

Answer 1

The shortest one I know for Oracle:

SELECT NVL2(nullableColumn, 1, 0) FROM someTable

NVL2(value, ifNotNull, ifNull) returns ifNotNull if the value is not null, and ifNull otherwise.