recordSeq 爲自增主鍵,missionID爲可能重複鍵
DELETE
FROM
t_cmp_record
WHERE
recordSeq NOT IN (
SELECT
t_temp.minSeq
FROM
(
SELECT
MIN(recordSeq) AS minSeq
FROM
t_cmp_record
GROUP BY
missionID
) t_temp
)
recordSeq 爲自增主鍵,missionID爲可能重複鍵
DELETE
FROM
t_cmp_record
WHERE
recordSeq NOT IN (
SELECT
t_temp.minSeq
FROM
(
SELECT
MIN(recordSeq) AS minSeq
FROM
t_cmp_record
GROUP BY
missionID
) t_temp
)