Hello DBExpert,
 
--input--
state city
AP     hyderabad
AP thirupathi
AP vijag
KT     bangalore
KT mysure
TN    chennai 
TN coembattore 
 
--output--
state city
AP     hyderabad,thirupathi,vijag
KT     bangalore,mysure
TN    chennai,coembattore
 
how can i write the Query to output in sql server