I'm developing an online website (using Django and Mysql). I have a Tests table and User table.

I have 50 tests within the table and each user completes them at their own pace. How do I store the status of the tests in my DB?

One idea that came to my mind is to create an additional column in User table. That column containing testid's separated by comma or any other delimiter.

userid | username | testscompleted
1        john       1, 5, 34
2        tom        1, 10, 23, 25

Another idea was to create a seperate table to store userid and testid. So, I'll have only 2 columns but thousands of rows (no of tests * no of users) and they will always continue to increase.

userid | testid
1        1
1        5
2        1
1        34
2        10