Thread: Join question

I have a table that is set up like this

table A:
First_name,Last_name,login

I have another table that is set up like this

table B:
date,date,person1,person2,person3

where the person1,2,3 is the login name from the first table.

I need to get the first_name and last_name of all 3 persons using one select (well I don't have to do it in one.. but I
thoughtit would be cleaner).. I can do one person using a join select like this: 

select A.First_name,A.Last_name from A,B where B.person1 = A.login

I tried adding an or statement like "or B.person2 = A.login" but that returns 2 entrys for each row.. where I'm trying
toget all the information back in one.   

Thanks in advance,

Travis

On Thu, 29 May 2003, Williams, Travis L, NPONS wrote:

> I have a table that is set up like this
>
> table A:
> First_name,Last_name,login
>
> I have another table that is set up like this
>
> table B:
> date,date,person1,person2,person3
>
> where the person1,2,3 is the login name from the first table.
>
> I need to get the first_name and last_name of all 3 persons using one
> select (well I don't have to do it in one.. but I thought it would be
> cleaner).. I can do one person using a join select like this:
>
> select A.First_name,A.Last_name from A,B where B.person1 = A.login
>
> I tried adding an or statement like "or B.person2 = A.login" but that
> returns 2 entrys for each row.. where I'm trying to get all the
> information back in one.

I think it'd be something like:
select a1.first_name, a1.last_name, a2.first_name, a2.last_name,
 a3.first_name, a3.last_name from
 A a1, A a2, A a3, B where
 B.person1=a1.login and B.person2=a2.login and B.person3==a3.login;

On Thu, May 29, 2003 at 20:20:35 -0400,
  "Williams, Travis L, NPONS" <tlw@att.com> wrote:
> I have a table that is set up like this
>
> table A:
> First_name,Last_name,login
>
> I have another table that is set up like this
>
> table B:
> date,date,person1,person2,person3
>
> where the person1,2,3 is the login name from the first table.
>
> I need to get the first_name and last_name of all 3 persons using one select (well I don't have to do it in one.. but
Ithought it would be cleaner).. I can do one person using a join select like this: 
>
> select A.First_name,A.Last_name from A,B where B.person1 = A.login
>
> I tried adding an or statement like "or B.person2 = A.login" but that returns 2 entrys for each row.. where I'm
tryingto get all the information back in one.   

You need to join table A three times and give it three different aliases.
One alias gets get checked for each of the three people.