Querying multiple tables in MySQL

This video demonstrates how to query data from multiples tables in MySQL. The relationship between the tables is created in the WHERE clause.

[KUMAR-qoq]

I have a doubt. I have table with two fields, one field is array in table 1
uID | Contact
2 | 1221, 1223
3 | 1123

Now value of 1221 and 1223 are in table Two. I want a query to join table 1 and table 2 using array of field2