की पसंद बदलने का प्रयास करें...
count(select * from bookings where b.id_customer = c.id)
...से...
(select count(*) from bookings where b.id_customer = c.id)
की पसंद बदलने का प्रयास करें...
count(select * from bookings where b.id_customer = c.id)
...से...
(select count(*) from bookings where b.id_customer = c.id)