ORDER BY ASC with Nulls at the Bottom

Question

I\'m writing an SQL query that connects a schools table to a districts table. Simple One-To-Many relationship where each school is attached to one district. My query is as

Answer 1

You could use the ISNULL() function.

From the MySQL manual:

ISNULL(expr)

If expr is NULL, ISNULL() returns 1, otherwise it returns 0.

For example:

ORDER BY ISNULL(districts.name), districts.name, schools.name

I like to use this instead of the CASE option for MySQL. Just be aware that it's not portable since ISNULL() is not standard SQL and functions differently in other versions of SQL.