Join table with empty data

[cesarcesar]

Hello,

I'm a novice, and am having issues get a JOIN to work properly. The following code is correct for pulling field values that HAVE a value, but when a field i am requesting has a value like Null, Space, or just empty, the whole query comes back empty.

It was suggested i use TRIM in my call, but i'm not exactly sure how to use properly.

As far as each table, the fields that are empty are set to ALLOW NULL. Thanks for the help.

Select
company.company_name,
company.company_username,
company.company_clients_served,
company.company_status,
note.note_text,
address.address_street1,
address.address_street2,
address.address_zip,
address.address_zip_ext,
county.county_id,
city.city_name,
taxes_states.state_id,
email.email_address,
url.url_path,
url.url_name,
company_type.company_type_id
From
company
Inner Join note ON company.note_id = note.note_id
,
address
Inner Join connector_address ON company.company_id = connector_address.ref_id AND connector_address.address_id = address.address_id
Inner Join county ON address.county_id = county.county_id
Inner Join city ON address.city_id = city.city_id
Inner Join taxes_states ON address.state_id = taxes_states.state_id
Inner Join connector_email ON company.company_id = connector_email.ref_id
Inner Join email ON connector_email.email_id = email.email_id
Inner Join connector_url ON company.company_id = connector_url.ref_id
Inner Join url ON connector_url.url_id = url.url_id
,
company_type
Inner Join connector_company ON company_type.company_type_id = connector_company.company_type AND company.company_id = connector_company.company_id
Where company.company_id = '15'

 

[jpadie]

this is not a php question. i would recommend asking it in the mysql forum (if you are using mysql) or the relevant alternative forum for your rdbms of choice.

for general query modelling, i use an odbc connector and link the tables to an access database where you can use the gui query modeller and then convert to sql when you get the results you are looking for. there are other graphical query modelling tools available but many people already have access with their office suite.

 

[AdaHacker]

Sounds to me like you shouldn't be using inner joins. An inner join will only return records where both tables match on the join field. If you want rows where one table will not have a match on the join column, then you want to use an outer join. Here's a quick run-down on the difference:

http://en.wikipedia.org/wiki/Join_(SQL)