如何用逗號分隔顯示多列？

Question

我的表像這樣

projectname userlist 

banking   john 
banking   ram 
hospital  ramesh 

我想這樣

banking john,ram 
hospital  ramesh 

Answer 1

的mysql>
輸出 - > SELECT student_name，
- > GROUP_CONCAT（DISTINCT test_score
- > ORDER BY test_score DESC SEPARATOR''）
- > FROM student
- > GROUP BY student_name;

你應該看看到GROUP_CONCAT。

上一代碼取自MySQL Reference Docs。

Answer 2

純SQL：

SELECT 
    projectname 
    ,GROUP_CONCAT(userlist) AS userlist 
FROM 
    projects 
GROUP BY 
    projectname