Table1
+---------+---------+
|  CompA  |  CompB  |
+---------+---------+
| Value 1 | Value 2 |
| Value 1 | Value 3 |
| Value 2 | Value 3 |
+---------+---------+

Table 2
+------+---------+---------+
| T2PK |  CompA  |  CompB  |
+------+---------+---------+
| A    | Value 1 | Value 2 |
| B    | Value 1 | Value 3 |
| C    | Value 2 | Value 3 |
| D    | Value 2 | Value 3 |
+------+---------+---------+

Table 1
+----+---------+---------+
| ID |  CompA  |  CompB  |
+----+---------+---------+
|  1 | Value 1 | Value 2 |
|  2 | Value 1 | Value 3 |
|  3 | Value 2 | Value 3 |
+----+---------+---------+

Table 2
+----+------+
| PK | T1FK |
+----+------+
| A  |    1 |
| B  |    2 |
| C  |    3 |
| D  |    3 |
+----+------+