mysql - 从两个表中统计，并按照存在的SQL个数排序

Question

我试图列出一个包含出现超过三次的数字的表格。如您所见，我是 SQL 的新手。我对 SQL 的语法和可能性有点不确定。

我试过这个:

SELECT tabel1.nr, count(tabel2.opp)
FROM tabel1
JOIN tabel2 on tabel2.opp = tabel1.opp
WHERE tabel2.opp > 3
ORDER BY tabel2.opp

这是我试图弄清楚的想法:

SELECT COUNT(tabel1.key = tabel2.key) as numbers
FROM table1
ORDER BY numbers > 3

Answer 1

试试这个

SELECT tabel1.nr, count(tabel2.opp)
FROM tabel1
JOIN tabel2 on tabel2.opp = tabel1.opp
GROUP BY tabel1.nr
HAVING count(tabel2.opp) > 3
ORDER BY tabel2.opp