카페 가입여부 체크

create function memChk(@memNum int, @cafeNum int)
returns bit
begin
 declare @returns bit
 set @returns = 0
 declare @cnt int
 set @cnt = (select count(*) from member_join where fk_member = @memNum and fk_cafe = @cafeNum)
 if(@cnt > 0)
 begin
  set @returns = 1
 end
 return @returns
end