For each user, find their name and the number of reviews written by them.
SELECT T1.name ,  count(*) FROM useracct AS T1 JOIN review AS T2 ON T1.u_id  =  T2.u_id GROUP BY T2.u_id
SELECT T1.name ,  count(*) FROM useracct AS T1 JOIN review AS T2 ON T1.u_id  =  T2.u_id GROUP BY T2.u_id
[{'name': 'Helen', 'count(*)': 3}, {'name': 'Mark', 'count(*)': 4}]