2
我从下面的查询MySQL的SELECT COUNT DISTINCT
SELECT co.mobility_theme, COUNT(DISTINCT ca.user_id) AS n
FROM courses_apply AS ca LEFT JOIN dy41s_courses AS co ON ca.course_id = co.id
WHERE ca.submission IS NULL AND ca.`call` LIKE '1b'
GROUP BY co.mobility_theme
ORDER BY co.mobility_theme ASC
得到如下结果总(133)
mobility_theme n
1 =>70
4 =>18
5 =>45
我想要做的是:为每个移动主题(1,2和5),我有重复的用户,所以总唯一的user_id应该是(130),我无法通过(移动性主题)获得唯一的user_id组,任何帮助?
没关系,但是你喜欢的子句是什么? – Drew
它只是获得指定的“电话” – MMSA
的记录我知道,但它不是'like' – Drew