Sql server 2008 选择多条相同记录的第一行

我正在使用的查询有多个firstname，一个电子邮件地址的lastname。如何仅选择第一行而忽略其余行。 像

结果特蕾西·杜根td@test.com 我有多行相同的电子邮件地址。如何做到这一点

      SELECT distinct f.email_address,TITLE,FIRST_NAME,LAST_NAME FROM
      #tempFinal F,temp htc
      where f.EMAIL_ADDRESS = htc.EMAIL_ADDRESS 

---

按

电子邮件地址

对结果集进行分区，并使用

行编号

分配序列，然后进行筛选。使用

order by

子句调整顺序标准

select firstname, lastname, email_address from (
select firstname, lastname, email_address, row_number() over
(partition by email_address order by firstname, lastname) as ranker
from table ) Z where ranker = 1

---

请定义“第一”的含义，例如：第一个是id，第一个是姓氏等

select firstname, lastname, email_address from (
select firstname, lastname, email_address, row_number() over
(partition by email_address order by firstname, lastname) as ranker
from table ) Z where ranker = 1