Match 2 sql columns if = then update a different column by 1

Question

Im looking to see if there is a match between what someone submitted in one table to a different table in the database. I can\'t quite figure out how to set it up. What im

Answer 1

if this is what you want

update tableA set colA=(select (case when b.colB=colA then colC+1 else colC end) from tableB b)