基於相同的柱頭在mysql中分組php

Question

我正在上傳文件上傳成功的文件上傳項目。

我現在正在顯示其用於存儲上傳的文件細節我上傳的表是這樣的：

+--------------------+--------------------+------------------+-----------+ 
| projectId  | filename   | projectDetails |ProjectName | 
+--------------------+--------------------+------------------+------------+ 
| pid1    | admin.zip   | This Is A Test |myProject | 
| pid1    | admin1.zip   | This Is A Test |myProject | 
| pid2    | admin2.zip   | This Is A Test2 |myProject2 | 
| pid2    | admin3.zip   | This Is A Test2 |myProject2 | 
| pid1    | admin4.zip   | This Is A Test |myProject | 
+--------------------+--------------------+------------------+------------+ 

可我知道，我可以得到這樣的

+--------------------+--------------------+------------------+-----------+ 
| projectId  | filename   | projectDetails |ProjectName | 
+--------------------+--------------------+------------------+------------+ 
| pid1    | admin.zip   | This Is A Test |myProject | 
|     | admin1.zip   |     |   | 
|     | admin4.zip   |     |   | 
+--------------------+--------------------+------------------+------------+ 

Answer 1

輸出什麼關於使用此查詢：

select projectId, GROUP_CONCAT(distinct filename) as filename, projectDetails, ProjectName 
from yourtable 
group by pid1