我在php和Android应用程序中构建一个子控件应用程序来跟踪设备？ [关闭]

Question

Any advice on should I go about linking a parent to certain child a mysql database. I don't have any code for just yet I would like some more experienced advise.

Answer 1

ideally you would build this relationship in the following manner:

you have your Parent table with fields: PARENT ID PARENT NAME

then you have your Child table like: CHILD ID CHILD NAME

then you have a PARENT-CHILD table like: PARENT ID CHILD ID

in this PARENT-CHILD table, each CHILD ID maybe listed combined with 1, or 2 PARENT IDs at the most. A PARENT ID however maybe listed combined with any number of children (hopefully not more than 4, otherwise its not your children than need to be "controlled.")