I am making a mySQL table which lists ~70 products and information on whether they are compatible or not. For the sake of simplifying the question, I will pretend there were only four products.

```
Product1    Product2    Compatible?
A           A           Yes
A           B           No
A           C           Maybe
A           D           Yes
B           A           Yes
B           B           Yes
B           C           Yes
B           D           No
C           A           Yes
C           B           Maybe
C           C           Yes
C           D           Yes
D           A           Yes
D           B           No
D           C           Yes
D           D           Yes

```

If I already have a table like (every product is obviously compatible with itself)

```
Product1    Product2    Compatible?
A           A           Yes
B           B           Yes
C           C           Yes
D           D           Yes

```

Is there a way I can quickly fill out the first two columns so they follow the correct pattern? (so I dont have to be doing it manually)