the data which I have look like
Name Number
A1 12,13,14,15
A2 8,9,10
A3 5,6,7
A4 3,5,7
output should come in the format
Name Number
A1 12
A1 13
A1 14
A1 15
A2 8
. .
.
. .
tried unpivot, tried stack() after splitting data. not able to get to desired output