uni=# explain analyze
uni=# select * from Students where stype='local';
                       QUERY PLAN
----------------------------------------------------------
 Seq Scan on students
             (cost=0.00..562.01 rows=23544 width=9)
             (actual time=0.052..5.792 rows=23551 loops=1)
   Filter: ((stype)::text = 'local'::text)
   Rows Removed by Filter: 7810
 Planning time: 0.075 ms
 Execution time: 6.978 ms