From: Rob V <taketwosolutions@gmail.com>
To: pgsql-sql@postgresql.org
Subject: LEFT Join Question
Date: Thu, 25 Jan 2007 18:51:34 -0500
Message-ID: <34785f060701251551u23538daej2b45f0c522bf1b7a@mail.gmail.com> (raw)
Hello all,
Ive been racking my brain for a few hours now and need some help, please!!!
I have the following tables :
account
=account_id
=account_type_id
=account_username
vendor
=account_id
=vendor_status
contact_name
=account_id
=name
=domain_type_id
contact_address
=account_id
=address
=domain_type_id
contact_email
=account_id
=email
=domain_type_id
contact_phone
=account_id
=phone
=domain_type_id
account_type
=account_type_id
= account_type_tag
records :
1 VENDOR
2 SELLER
3 CONTRACTOR
domain_type
=domain_type_id
=domain_type_tag
records :
1 PRIMARY
2 SECONDARY
Im looking for a select that will give me all records where the
account_type_tag ="VENDOR" and domain_type_tag = "PRIMARY"
even if the address, email and phone are blank.
Users WILL HAVE records in the following tables :
account,
vendor
contact_name
contact_email
they MAY or MAYNOT have records in the following tables :
contact_address
contact_phone
I know I have to use a left join - but I can seem to figure out the syntax
when dealing w/ different columns of the same table.
Im basically looking for this :
account_username vendor_status name address
email phone
---------------------------------------------------------------------------------------------------------------------------------------------------------
Rob123 ACTIVE ROB 123
Test Drive rob@here.com 555-1212
BILL123 ACTIVE Bill
NULL bill@here.com 456-4444
Steve1234 INACTIVE Steve 654
Hill St steve@here.com NULL
I know I have to use a left join - but I can seem to figure out the syntax
when dealing w/ different columns of the same table.
(do I still need the = in the where clause when using a left join?)
SELECT
account.account_id,
account.account_username,
vendor.vendor_status,
contact_name.name,
contact_address.address,
contact_email.email,
contact_phone.phone
FROM
account a
LEFT JOIN contact_phone on (contact_phone.account_id = a.account_id)
LEFT JOIN contact_address on (contact_address.account_id = a.account_id),
vendor,
contact_email,
contact_name,
domain_type,
account_type,
WHERE
vendor.vendor_id = account.account_id AND
contact_email.account_id = account.account_id AND
contact_name.account_id = account.account_id AND
account.account_type_id = account_type.account_type_id AND
contact_email.domain_type_id = domain_type.domain_type_id AND
contact_name.domain_type_id = domain_type.domain_type_id AND
vendor.vendor_status_code_id = vendor_status_code.vendor_status_code_id AND
account_type.account_type_tag = 'ACCOUNT_VENDOR' AND
domain_type.domain_type_tag = 'VENDOR_PRIMARY'
The problem Im having is b/c Im only looking for specific domain types I
have a join on the contact address and phone tables where the
domain types match - but if there are no records - it causes the entire
record not to be show - so I need to do a left join on that table as well
but If I try to do it - I get an error " table name "contact_phone"
specified more than once"
Any help would be great!!!
Thanks
-Rob
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To: pgsql-sql@postgresql.org
Cc: taketwosolutions@gmail.com
Subject: Re: LEFT Join Question
In-Reply-To: <34785f060701251551u23538daej2b45f0c522bf1b7a@mail.gmail.com>
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