Question

inner join same table twice

Asked by: coolcyber

Hi
I am trying to get "state name" and "desired state name" based on stateid which is in another table. For this i have to do join twice on state table. But when i do that, i don't get any results. I have all values.

can anyone give a soultion for this problem.
Query:
Select u.displayname, up.*, a.avatarpic, tc.countryname, ts.statename, isnull(tds.statename,0) as desiredstatename, ut.usertype
from             tbl_User u
inner join       tbl_userprofile up on u.userid=up.userid
inner join      tblCountries tc on tc.countryid = up.country
inner join      tblStates ts on ts.stateid = up.state
inner join      tblStates tds on tds.stateid = up.desiredstate
inner join      tbl_userType ut on ut.usertypeID = u.usertypeID
inner join       tbl_avatar a on u.avatarid=a.avatarid
Where      u.Userid = @Userid

Thanks in advance

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Asked On
2006-04-20 at 10:13:28ID21821088
Tags

same

,

table

,

join

,

twice

,

inner

Topic

MS SQL Server

Participating Experts
3
Points
125
Comments
6

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Answers

 

by: wstuphPosted on 2006-04-20 at 10:19:44ID: 16500317

Do you get results if you change it to a left outer join?  If you're inner joining and it's not there then it's not going to show up.

 

by: rafranciscoPosted on 2006-04-20 at 10:20:04ID: 16500319

If the desired state is null then you won't get any record for the user.  Instead of using INNER JOIN, try using a LEFT JOIN:

Select u.displayname, up.*, a.avatarpic, tc.countryname, ts.statename, isnull(tds.statename,0) as desiredstatename, ut.usertype
from          (tbl_User u
inner join      tbl_userprofile up on u.userid=up.userid
inner join     tblCountries tc on tc.countryid = up.country
inner join     tblStates ts on ts.stateid = up.state
inner join     tbl_userType ut on ut.usertypeID = u.usertypeID
inner join      tbl_avatar a on u.avatarid=a.avatarid)
left join tblStates tds on tds.stateid = up.desiredstate
Where     u.Userid = @Userid

 

by: SireesPosted on 2006-04-20 at 10:20:58ID: 16500327

Can you try this???

Select u.displayname, up.*, a.avatarpic, tc.countryname, ts.statename, isnull(tds.statename,0) as desiredstatename, ut.usertype
from           tbl_User u
inner join      tbl_userprofile up on u.userid=up.userid
inner join     tblCountries tc on tc.countryid = up.country
left join     tblStates ts on ts.stateid = up.state
left join     tblStates tds on tds.stateid = up.desiredstate
inner join     tbl_userType ut on ut.usertypeID = u.usertypeID
inner join      tbl_avatar a on u.avatarid=a.avatarid
Where     u.Userid = @Userid

 

by: coolcyberPosted on 2006-04-20 at 10:24:24ID: 16500364

when i use "left join" i get a result  but with "NULL" in desiredstate column.
But i have a value in desiredState column

 

by: coolcyberPosted on 2006-04-20 at 10:26:00ID: 16500380

Sirees:
tried that, but no result in desiredstate column

 

by: coolcyberPosted on 2006-04-20 at 10:41:13ID: 16500512

my bad i was looking into wrong column

20120131-EE-VQP-002

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