Saying that I have a table as below:
year month price
1991 1 1.1
1991 2 1.2
1991 3 1.3
1992 1 2.1
1992 2 2.2
1992 3 2.3
Now I want to generate such a table according to the table above:
year m1 m2 m3
1991 1.1 1.2 1.3
1992 2.1 2.2 2.3
How to do this with SQL?