Question

我必须找到在同一部剧中扮演两个角色的艺术家;显示每个此类游戏的标题，艺术家的名字和两个角色另外，我不能使用group by。以下是表格：

Plays(Playid,Title,Director,Year,Cost)
Artists(Artistid,Name,Gender,Birthdate)
Roles(Playid,Artistid,Character)

这是我到目前为止所做的：

select title, a.name, p.playid, r.character, a.artistid 
   from plays p 
   left join roles r on p.playid = r.playid 
   left join artists a on r.artistid = a.artistid;

Answer 1

你可以试试这个：

select p.title, a.name, r.character, r2.character
from roles r join roles r2 on (r.artistid = r2.artistid and 
                               r.playid = r2.playid and 
                               r.character < r2.character)
left join plays p on r.playid = p.playid
left join artists a on r.artistid = a.artistid

Answer 2

添加以下内容：

其中a.Artistid in （选择Artistid 来自角色 Artistid小组有计数（*）= 2 ）

Answer 3

请检查我的查询：

      Select a.Name,p.Title,r.Character from (select * from Artist where Artistid in
        (select Artistid from Role group by aid having count(rl.Character)>=2)) a 
        left join Role r on r.Artistid=a.Artistid
        left join Play p on r.Playid=p.Playid;

SQL查询在同一个游戏中查找具有两个角色的所有艺术家

3 个答案: