I have the following query in mysql.
SELECT COUNT(*) FROM (select SUM(tabla1.campo1) from 'tabla1' inner
join 'tabla2' on 'tabla1'.'tabla1_id' = 'tabla2'.'tabla2_id' where
'tabla1'.'campo1' <> 0 group by LOWER(tabla1.campo2)) tabla_general
How can I transcribe it to Query Builder in Laravel 5.5? Thanks.