| Group (cost=4490.72..4492.34 rows=151 width=4) |
| Group Key: out_device |
| -> Sort (cost=4490.72..4491.53 rows=324 width=4) |
| Sort Key: out_device |
| -> Seq Scan on tbl_punch (cost=0.00..4477.21 rows=324 width=4) |
| Filter: ((out_device IS NOT NULL) AND (user_id = 1001)) |