SQLite select where empty?

Question

In SQLite, how can I select records where some_column is empty?
Empty counts as both NULL and \"\".

Answer 1

There are several ways, like:

where some_column is null or some_column = ''

or

where ifnull(some_column, '') = ''

or

where coalesce(some_column, '') = ''

of

where ifnull(length(some_column), 0) = 0