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

No need to use case... when:

select (column_name is not null) as result from table_name;

Returns 1 for all fields not NULL and 0 for all fields that are NULL, which is as close as you can get to booleans in SQL.