[英]SQL using MAX and COUNT
我需要選擇所有具有最大行數的東西。
我正在使用這個:
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
但是,最終得到的結果與此相同:
SELECT T1.something, COUNT(*) my_count
FROM table T1, table2 T2
WHERE T1.value = T2.value
GROUP BY T1.something
我可以使用ROWNUM = 1
ORDER BY my_count DESC
,但這不能解決我的問題,因為如果它們具有相同的值,則需要選擇所有最大值。
在您的Where
條件下使用Max
:
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)
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