Noddy ANSI SQL question syntax

[ELBBUBKUNPS]

Correct and by playing around you have figured it out. Are you just making sure what you deduced is correct ?

Yeah just making sure I was correct and there wasn't anything else I was missing. Thanks for confirming

[fullyautomatix]

Hi,

For hundreds of years I have been using (+) or * for my outer joins, now I have to use the ANSI stuff LEFT OUTER, RIGHT OUTER etc, and I'm struggling with it (I feel ashamed). I've looked online at guides etc and wrote SQL to test it but I am still not 100% sure my understanding is correct.

In a nutshell what I am not clear on is what part of the JOIN clause does it consider when its working out the left and right tables for example see the basic example below.

SELECT
dim_client.NAME,
fact_sales.Revenue
FROM
fact_sales RIGHT OUTER JOIN dim_client
ON (dim_clients.client_id=fact_sales.client_id)


When its working out what the RIGHT side table is does it look at this part of the SQL,

FROM
fact_sales RIGHT OUTER JOIN dim_client


or this part ?

On(
dim_clients.client_id=fact_sales.client_id)

Playing around with it if I move the tables round in the first part I get different results however if I change the order in the part after ON I get no change, so I'm assuming it considers the first clause after the FROM to work out the right and left is this correct ?

FROM
fact_sales RIGHT OUTER JOIN dim_client

Correct and by playing around you have figured it out. Are you just making sure what you deduced is correct ?

[ELBBUBKUNPS]

Hi,

For hundreds of years I have been using (+) or * for my outer joins, now I have to use the ANSI stuff LEFT OUTER, RIGHT OUTER etc, and I'm struggling with it (I feel ashamed). I've looked online at guides etc and wrote SQL to test it but I am still not 100% sure my understanding is correct.

In a nutshell what I am not clear on is what part of the JOIN clause does it consider when its working out the left and right tables for example see the basic example below.

SELECT
dim_client.NAME,
fact_sales.Revenue
FROM
fact_sales RIGHT OUTER JOIN dim_client
ON (dim_clients.client_id=fact_sales.client_id)


When its working out what the RIGHT side table is does it look at this part of the SQL,

FROM
fact_sales RIGHT OUTER JOIN dim_client


or this part ?

On(
dim_clients.client_id=fact_sales.client_id)

Playing around with it if I move the tables round in the first part I get different results however if I change the order in the part after ON I get no change, so I'm assuming it considers the first clause after the FROM to work out the right and left is this correct ?

FROM
fact_sales RIGHT OUTER JOIN dim_client