結合類似的查詢結果到一行

Question

我

ID username group 
1 philip football 
2 george baseball 
3 alice football 
4 ani  football 
5 george football 

，並試圖使這個

username group 
philip  football 
george  baseball, football 
alice  football 
ani  football 

換句話說，我想將GROP idetms合併爲一個字符串喜歡這裏「baysboll，足球「

Answer 1

您需要GROUP_CONCAT功能

select username, GROUP_CONCAT(group) FROM table GROUP BY Username 

Answer 2

不要忘記用反向標記逃離Group以避免語法錯誤。 GROUP是Reserved Keyword。

SELECT username, GROUP_CONCAT(`group`) 
FROM table 
GROUP BY userName