I have result when executing my query like that:
+--------+--------+
- col1 - col2 -
+--------+--------+
- a,b - 1 -
- a,c - 2 -
- b,c - 3 -
- a,b,c - 4 -
- a,c,d - 5 -
+--------+--------+
How I can split each result row into new row result with only "a" or "b" or "c"
+--------+--------+
- col1 - col2 -
+--------+--------+
- a - 1 -
- a - 2 -
- a - 4 -
- a - 5 -
- b - 1 -
- b - 3 -
- b - 4 -
- c - 2 -
- c - 3 -
- c - 4 -
- c - 5 -
- d - 5 -
+--------+--------+