| Group (cost=2374.40..2376.97 rows=171 width=4) |
| Group Key: out_device |
| -> Sort (cost=2374.40..2375.68 rows=515 width=4) |
| Sort Key: out_device |
| -> Seq Scan on tbl_punch (cost=0.00..2351.20 rows=515 width=4) |
| Filter: ((out_device IS NOT NULL) AND (user_id = 1011)) |