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selecting across multiple tables to check permission

Posted on 2008-11-01
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Last Modified: 2012-05-05
I have a series of tables

people
===============
id,strName,nOfficeID

office
==============
id,strName,nDistrictID

and then i have users

user
==============
id,strUsername

and then finally which districts the users can view

userdistrict
==============
id,nDistrictID,nUserID

I want to get a list of all people but only people that belong to offices which are in districts that I as a user can see. A user may see multiple districts.
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Question by:phenixfilms
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Guy Hengel [angelIII / a3] earned 125 total points
ID: 22858847
you mean:
select p.strName, o.strName office_name
  from userdistrict ud
  join office o
    on o.nDistrictID = ud.nDistrictID
  join people p
    on p.nOfficeID = o.id
where id.nUserID = 1234  <<<-- the user you are querying for

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Author Comment

by:phenixfilms
ID: 22858885
What about the user? I see your selecing WHERE id.nUserID.... but you've never set id to be a table or anything.

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LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22858920
that should have been ud.nUserID instead of id.nUserid ...
ud being the table alias of userdistrict.

I assume that you want to query for 1 single user...
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