选择具有最大条件

Question

对于我的数据库表的条款：在我的表3

//table1 
name 
--------- 
john 
mary 
ali 

在我的表2

//table2 
title 
--------- 
test1 
test2 
test3 

//table3 
name  title 
----------------- 
john  test1 
john  test2 
john  test3 
mary  test2 

所以我的问题是要找到的标题，多次被名字加入。

所以我的查询是：

SELECT t2.title from table2 t2 inner join table3 t3 on 
    t2.title = t3.title inner join table1 t1 on 
    t1.name = t3.name having max(....) 

为我检查一些网站。他们所使用的having子句仅用于数字，我找不到任何的例子，适合我的问题需要COUNT（*）

预期输出：

//result 
title 
--------- 
test2 

Answer 1

排序计得到一个列表，从最普通的ttile

SELECT t2.title 
from table2 t2 
inner join table3 t3 on t2.title = t3.title 
inner join table1 t1 on t1.name = t3.name 
group by t2.title 
order by count(*) desc 

开始变得只有顶部的结果使用

SELECT * FROM 
(
    SELECT t2.title 
    from table2 t2 
    inner join table3 t3 on t2.title = t3.title 
    inner join table1 t1 on t1.name = t3.name 
    group by t2.title 
    order by count(*) desc 
) X 
WHERE ROWNUM = 1; 

Answer 2

SELECT max(name) KEEP(DENSE_RANK FIRST ORDER BY COUNT(NAME) DESC) 
FROM table3 
GROUP BY name