| Group (cost=4503.62..4506.50 rows=174 width=4) |
| Group Key: out_device |
| -> Sort (cost=4503.62..4505.06 rows=576 width=4) |
| Sort Key: out_device |
| -> Seq Scan on tbl_punch (cost=0.00..4477.21 rows=576 width=4) |
| Filter: ((out_device IS NOT NULL) AND (user_id = 1000)) |