1.
declare @tstr char(10)
1.1
set @tstr = ‘wow’
set @tstr = @tstr + ‘good’
select @tstr
1.2
set @tstr = ‘wow’
select @tstr +‘good’
select rtrim(@tstr) + ‘good’
2.
declare @tstr varchar(10)
2.1
set @tstr = ‘wow’
set @tstr = @tstr + ‘good’
select @tstr
2.2
set @tstr = ‘wow’
select @tstr +‘good’
한번 차례대로 실행시켜 보고, 비교해보세요.