这将填充NEW_TABLE
唯一值,该id
值是该串的第一个ID:
INSERT INTO NEW_TABLE
SELECT MIN(ot.id),
ot.city,
ot.post_code,
ot.short_ccode
FROM OLD_TABLE ot
GROUP BY ot.city, ot.post_code, ot.short_ccode
如果您想要每束最高的id值:
INSERT INTO NEW_TABLE
SELECT MAX(ot.id),
ot.city,
ot.post_code,
ot.short_ccode
FROM OLD_TABLE ot
GROUP BY ot.city, ot.post_code, ot.short_ccode