number | time
421112233444 | 1304010250
421112233444 | 1304272979
421001122333 | 1303563263
421112233444 | 1300217115
421001122333 | 1303649310
我需要从第二行返回唯一具有最小编号的第一行,如下所示:
421112233444 | 1300217115
421001122333 | 1303563263
任何想法?
我尝试SELECT ph.number,mo.time from(select distinct(number)from table)ph,table mo其中mo.number = ph.number;
但它返回两个唯一身份:
421112233444 | 1304010250
421112233444 | 1304272979
421001122333 | 1303563263
421112233444 | 1300217115
421001122333 | 1303649310
答案 0 :(得分:3)
您可以使用GROUP BY执行此操作:
SELECT number, MIN(time)
FROM table
GROUP BY number
ORDER BY number DESC
LIMIT 2
答案 1 :(得分:0)
SELECT ph.number, min(mo.time) from (select distinct(number) from table) ph, table mo group by ph.number