将二维数组存储在MySQL数据库中

Question

我正试图建立一个项目，我需要将数据存储到MySQL数据库。 对于每个活动，我可以有几个资源。就像活动一样，我可以有Resource1，Resource2，Resource3等。

如何将这些资源存储在数据库的单个列中？

foreach($_POST['name'] as $key=>$value){ 
     //what do I insert? 
     mysqli_query($conn,"INSERT INTO activity 
      (`serial`,`Name`) VALUES(null,'$value')"); 
    } 

现在，我只能保存活动的名称。

Answer 1

一般来说，你不应该;而是创建一个activity_resources表。该表可以允许多行引用同一活动，并使用每行存储单独的资源。

activity: 
- identifier field (often an auto-increment, but perhaps "serial" in this case) 
- fields for "fixed" activity data, such as: name, perhaps date started; 
    basically any values all activities are expected to have in fixed quantities. 

activity_resources: 
- activity identifier 
- resource value|data 

如果资源可在多个活动之间共享，而不是有一个resources表（保存资源），并使用表activity_resources一种用于M：N关系;在这种情况下，表格的行将引用活动和资源表。

activity: 
- identifier field (often an auto-increment, but perhaps "serial" in this case) 
- fields for "fixed" activity data, such as: name, perhaps date started; 
    basically any values all activities are expected to have in fixed quantities. 

resource: 
- identifier field 
- resource value|data 

activity_resources: 
- activity identifier 
- resource identifier