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
 
    