SQL

Question

我有以下 table setup/data:

create table #temp (irecordid int, sdocumentno varchar(20), dtfileddate datetime, mnyconsideration money)

insert into #temp values (1, '3731572', '6-30-2014', 120.00)

Create table #temp2 (irecordid int, address varchar(255))

insert into #temp2 values (1, '406 N CUSTER')
insert into #temp2 values (1, '2015 E HANSON')


Create table #temp3 (irecordid int, srdocumentno varchar(25))
insert into #temp3 values (1, '55489')
insert into #temp3 values (1, '99809')

我正在尝试 select 所以我只得到每个 table 的不同实例。我正在尝试：

select distinct sdocumentno, address, srdocumentno
from #temp t1
join #temp2 t2 on t1.irecordid = t2.irecordid
join #temp3 t3 on t1.irecordid = t3.irecordid

而我的结果如下：

3731572 2015 E HANSON   55489
3731572 2015 E HANSON   99809
3731572 406 N CUSTER    55489
3731572 406 N CUSTER    99809

我真的只想要来自每个 table 的不同数据，如下所示：

3731572   2015 E HANSON   55489
3731572   406 N CUSTER   99809

有什么方法可以做到这一点吗？

谢谢！

Answer 1

我猜你想在 "row number" 上 join，但那不存在。但是，您可以生成一个然后加入它们：

select sdocumentno, address, srdocumentno
from #temp t1 join
     (select t2.*,
             row_number() over (partition by irecordid order by (select NULL)) as seqnum
      from #temp2 t2
     ) t2
     on t1.irecordid = t2.irecordid join
     (select t3.*,
             row_number() over (partition by irecordid order by (select NULL)) as seqnum
      from #temp2 t3
     ) t3
     on t1.irecordid = t3.irecordid and t2.seqnum = t3.seqnum;

如果列表长度不同，您可以使用 full outer join。

SQL - 如何在不重复数据的情况下 select 区分和连接多个表

SQL - How to select distinct and join multiple tables without duplicating data

sql-server

join