Question

我如何限制JOIN只为每位玩家展示一次？ LIMIT 1

SELECT name FROM players p 
INNER JOIN player_frags pd ON pd.lasthit = p.name 
OR pd.mostdamage = p.name 
LIMIT 10

也许找到最常见的lasthit或mostdamage的值，然后按

排序

Answer 1

SELECT DISTINCT(name) FROM players p 
INNER JOIN player_frags pd ON pd.lasthit = p.name 
OR pd.mostdamage = p.name

Answer 2

您可以使用distinct

SELECT distinct name FROM players p 
INNER JOIN player_frags pd ON pd.lasthit = p.name 
OR pd.mostdamage = p.name

Answer 3

两种方式：

SELECT DISTINCT name FROM players p 
INNER JOIN player_frags pd ON pd.lasthit = p.name 
OR pd.mostdamage = p.name

或

SELECT name FROM players p 
INNER JOIN player_frags pd ON pd.lasthit = p.name 
OR pd.mostdamage = p.name 
GROUP BY name;

Answer 4

SELECT name FROM players p 
INNER JOIN player_frags pd ON pd.lasthit = p.name 
OR pd.mostdamage = p.name 
GROUP BY p.name

Answer 5

我认为你的意思是首先缩小你加入的原始表格，否则其他人的答案会更准确：

SELECT name FROM players p 
INNER JOIN (SELECT * 
            FROM player_frags pd
            GROUP BY pd.lasthit, pd.mostdamage) AS newpd ON newpd.lasthit = p.name OR
                                                            newpd.mostdamage = p.name 
LIMIT 10

加入时限制为1

5 个答案: