sum highest consecutive occurrence
I have a table with three columns ( lending_id int, installment_n serial int, status text ) and I wonder how to retrieve the biggest gap of WAITING_PAYMENT (status) for each lending_id. For the following example: lending_id | installment_n | status 71737 1 PAID 71737 2 PAID 71737 3 PAID 71737 4 PAID 71737 5 PAID 71737 6 WAITING_PAYMENT 71737 7 WAITING_PAYMENT 71737 8 WAITING_PAYMENT 71737 9 WAITING_PAYMENT 71737 10 WAITING_PAYMENT 71737 11 WAITING_PAYMENT 71737 12 WAITING_PAYMENT 71737 13 WAITING_PAYMENT 71737 14 WAITING_PAYMENT 71737 15 WAITING_PAYMENT 71737 16 WAITING_PAYMENT 71737 17