JOIN with multiple WHERE

[cjjubb]

Hi all.

I am currently trying to achieve the following

I have the following two tables

TABLE 1 - USERS

Ident | Name
--------------------
34 | Dave
35 | Adam
36 | Lucy
37 | Tom


TABLE 2 - PROFILE_DATA

PDID | Owner | Name | Value
-----------------------------------------------
660 | 34 | AreaType | Rural
661 | 34 | Country | United Kingdom
662 | 35 | AreaType | Rural
663 | 35 | Country | United States
664 | 36 | AreaType | Rural
665 | 36 | Country | United Kingdom
666 | 37 | AreaType | City
667 | 37 | Country | United Kingdom



I basically want to SELECT all the users from the database who are based in a 'Rural' location and live in the 'United Kingdom'.

In this case this would be 'Dave' and 'Lucy'.


I am aware I must create a JOIN between USERS.IDENT and PROFILE_DATA.IDENT and then execute two 'WHERE' clauses.

However I am unsure how to go about doing this.


Any help would be grately appreciated.

[amitshah]

You can use use self join and IN clause to get required data. Please find following query for same.

SELECT * from USERS 
where Ident IN (
SELECT a.Owner FROM `PROFILE_DATA` a, `PROFILE_DATA` b 
WHERE trim(a.Value) = 'Rular' AND trim(b.Value) = 'United Kingdom' 
AND a.Owner = b.Owner)

[ld_be]

Same thread at
http://forums.databasejournal.com/sh...ad.php?t=48599