sql server - SQL select menus which have no submenu -

i have table in sql server having title, id , refer. refer indicates item submenu of other.

sample table:

id   |  refer  |   title

1    |   0   |   menu 1

2    |    0  |   menu 2

3    |   1   |   submenu of 1

4    |   1   |   submenu of 1

i need query select items has no submenu (in case menu 2). have solved asp code counts submenus , omits unwanted results need pure sql query.

sql fiddle demo

select t1.* yourtable t1 left join yourtable t2 on t1.id = t2.refer t2.refer null , t1.refer=0