一个检测用户名是否存在

SQL code

ALTER procedure [dbo].[GetISExistsByName]
@StaffName nvarchar(50),
@out int output
as
set @out=1
if not exists (select * from LiveChainCSWeb.dbo.LC_Staff where Usertype_ID=3 and StaffName=@StaffName)
begin

set @out=0

end