MySQL returned an empty result set

Hallo!

I have table authors with columns (is_active is true or false):
ID | name | is_active

I have sql statement

 
 SELECT *
 FROM `authors`
 WHERE id = ( SELECT MAX( id ) FROM `authors` )
 AND is_active=1 

PHP:

And I expect to get the name with MAX ID and is_active=1 (true)

But MySQL returned an empty result set...

Where is the error?

Thanx!

 

SELECT * FROM authors WHERE is_active=1 ORDER BY id DESC LIMIT 1

Code (markup):

What is the output ?

 

Thanx!!. Its work.