Question

我需要选择具有最大行数的所有内容。

我正在使用它：

SELECT TMP.S, MAX(TMP.my_count)
FROM (
  SELECT T1.something S, COUNT(*) my_count
  FROM table T1, table2 T2
  WHERE T1.value = T2.value
  GROUP BY T1.something) TMP
GROUP BY TMP.S

然而，结果与此结果相同：

SELECT T1.something, COUNT(*) my_count
FROM table T1, table2 T2
WHERE T1.value = T2.value
GROUP BY T1.something

我可以将ORDER BY my_count DESC与ROWNUM = 1一起使用，但这并不能解决我的问题，因为如果它们具有相同的值，我需要选择所有最大值。

Answer 1

在Max条件中使用Where：

SELECT TMP.S, TMP.my_count
FROM (
      SELECT T1.something S, COUNT(*) my_count
      FROM table T1, table2 T2
      WHERE T1.value = T2.value
      GROUP BY T1.something 
      ) TMP
Where 
TMP.my_count = (select max(count(*)) from table1 T3 group by t3.something)

使用MAX和COUNT的SQL

1 个答案: