方法1：
DELETE FROM tms_temp_trailer_item tmp
WHERE ROWID =
(SELECT ROWID
FROM (SELECT ROWID,
ROW_NUMBER ()
OVER (
PARTITION BY stop_id, po_id
ORDER BY stop_id, po_id
)
rn
FROM tms_temp_trailer_item) tmp2
WHERE tmp.ROWID = tmp2.ROWID AND tmp2.rn > 1);
方法2：
DELETE FROM tms_temp_trailer_item tmp
WHERE NOT EXISTS
(SELECT NULL
FROM ( SELECT stop_id,
po_id,
MIN (ROWID) min_row_id
FROM tms_temp_trailer_item
WHERE row_type = 'FASTRACK'
GROUP BY stop_id, po_id) tmp2
WHERE tmp.ROWID = tmp2.min_row_id)
AND tmp.row_type = 'FASTRACK';