sqlserver存储过程demo

/*
SQL sertver  存储过程 的示例：用@@rowcount返回查询结果总数，
程序调用方法为： 
selectByStoreProcedure("{ ?=call proc_demo_students(?,?,?,?) }", paramsArray, pageSize, currentPage,3,false);
	*/	
ALTER PROCEDURE [dbo].[proc_demo_students]
	@sname char(10) = '',
	@sgender char(1) = '',
	@Phone varchar(11),
	@Extension varchar(10) = ''
AS
	set @Phone = isnull(@Phone, '')
	set @Extension = isnull(@Extension, '')
	set @sname = isnull(@sname, '')
begin
	select c.id,c.SurName,c.FirstName,cm.ContactNo,
	case c.Gender when 'M' then '男' when 'F' then '女' end as Gender
	from Customer  c 
	left join ContactMethod cm 
	on c.id = cm.CustomerId
	where ((@Phone='') or (cm.ContactNo like '%' + @phone + '%'))
	and ((@Extension='') or (cm.Extension like '%' + @Extension + '%'))	
	and ((@sname='') or ((rtrim(ltrim(c.surname))+rtrim(ltrim(c.firstName))) = @sname))	
	and cm.Channel = @sgender	
end	
return  @@rowcount