SQL Query 3 on Multiple Tables || Lesson 75 || DBMS || Learning Monkey ||

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

Thank you. Too Clear explanation. Appreciate your efforts

What if we have tables with millions of rows. Are we supposed to do Cartesian product?

nice sir