sql中两个表之间的多对多关系？

Question

I've two tables tbl_user and tbl_favItems looks like below:

 +-----+----------+          +-----+----------+
 |  ID |   Name   |          | ID  |   Name   |
 +-----+----------+          +-----+----------+ 
 |  1  |  Johan   |          |  1  |  Movies  |
 |  2  |  Peter   |          |  2  |  Food    |
 |  3  |  Kevin   |          |  3  |  Mobiles |
 |  4  |  Harry   |          |  4  |  Sports  |
 +-----+----------+          +-----+----------+
     User Table                 Fav. Table

Here i need to some logic like: Suppose Johan can have fav. Movies, Mobiles , and Peter can have fav. Food, Mobiles, Sports .etc;. In this case how can i relate fav.ID 1,3 to Johan and fav.ID 2,3,4 to Peter in a table? Is it possible?

I need some clue to move forward. Thanks in advance.

Answer 1

This looks like a many to many relationship between your tables, To relate your tables introduce a junction table which will hold references for these 2 tables like

user_favourites

user_id (pk of table 1)

item_id (pk of table 2)

Data in this table will look like

user_id item_id
1        1
1        3
2        2
2        3
2        4

Associative entity