使用 MAX + group by:
SELECT BookId,MAX(CreateDate) AS MaxCreateDate FROM Table1
WHERE StationID=2
GROUP BY BookId
ORDER BY MaxCreateDate
MAX在这里主要是用于排序。过滤重复的话,group by足矣
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使用 MAX + group by:
SELECT BookId,MAX(CreateDate) AS MaxCreateDate FROM Table1
WHERE StationID=2
GROUP BY BookId
ORDER BY MaxCreateDate
MAX在这里主要是用于排序。过滤重复的话,group by足矣
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