try this
create table transmast
(transmastId int,
trans_Name varchar(50),
trasnd_Date datetime)
create table transmastDetail
(transmastDetailId int,
transmastId int,
trans_Text varchar(50))
insert into transmast values(1,'abc','2012-10-10')
insert into transmast values(2,'lmn','2012-10-11')
insert into transmast values(3,'adk','2012-10-12')
insert into transmastDetail values(10,1,'New')
insert into transmastDetail values(11,1,'old ')
insert into transmastDetail values(12,1,'Current')
insert into transmastDetail values(13,2,'Red')
select transmastId,trans_name,trasnd_Date, STUFF(
( select ',' + trans_Text
FROM transmastDetail
WHERE transmastId=transmast.transmastId
FOR XML PATH('')), 1, 1, '') AS trans_Text
from transmast