学生寻求SSRS过滤器的帮助

Question

I'm using SSRS. I'm trying to setup a filter that functions as a phone number search. If there is no phone number, it could be null and otherwise search entered phone number. I've attached my code below.

declare @phonein varchar (50)
set @phonein = ''

select d.MethodTitle, d.Active, d.ReferralMethodID, s.TollFreePhoneID, s.Phone, s.AdminModifyDateTime
from tReferralMethod as d
inner join tTollFreePhone
as s
on s.ReferralMethodID = d.ReferralMethodID

where s.phone = @phonein

I'm at a standstill at the last line, I think.

Answer 1

要使用空参数值查找电话号码为空的记录，请使用

where (@phonein IS NULL and s.phone IS NULL) OR (s.phone = @phonein)