如果我能做到從表吧這個查詢: SELECT count(distinct bar_id) as count,
date_trunc('day', created_at) as date
FROM
bars
GROUP BY
date
ORDER BY
date desc
和表FOOS此查詢: SELECT count(distinct foo_i
我有一個名爲「演示」用下面的數據表:
Name Group MX
A XY 1
B YZ 1
B XY 2
C YZ 5
C XY 3
D YZ 2
E YZ 1
E XY 1
我想根據「MX唯一的名稱「最大的價值,當‘MX’的兩個相同的名字都是平等的,我需要他們中的一個,如下圖所示:
Name Group MX
A XY 1
B
msyql查詢 SELECT id,student_user_id,MIN(start_time) FROM appoint_course
WHERE student_user_id IN(
931,2034,2068,2111,2115,2173,2181,2285,2500,2505,2507,
2518,2594,2596,2600,2608,2637,2652,2654