MySQL Query conditional OR

Question

I´m working with virtuemart, and I have a table that store all the information about the orders and the address of the users. When a user sign in they give me one address that I call 'BillTo' but when they make and order, the user can create a new address called 'shipto'. So If they create a new address 'shipto' I have to send the invoice to 'billto' and the items of the order to 'shipto'. I´m trying to get all the addresses to send the items of the orders. So I have the table like this

ORDER_ID   |   TYPE   |   ADDRESS
----------------------------------
1           BT           My office
1           ST           My house
2           BT           Home home home
3           BT            office
3           ST           office 2

I need to get all the ST addresses, and if not exists get the BT address.

1           ST           My house
2           BT           Home home home
3           ST           office 2

How can I do that?

EDIT:

This is my SQL query. SELECT o.order_number,os.order_status_name,ou.first_name,ou.last_name,ou.last_name2,ou.phone_1,ou.phone_2,ou.address_1,ou.address_2,ou.zip,ou.city,uv.fieldtitle

FROM #__virtuemart_product_campaigns AS pc

LEFT JOIN #__virtuemart_order_items AS oi ON (pc.virtuemart_product_id = oi.virtuemart_product_id)

LEFT JOIN #__virtuemart_orders AS o ON (oi.virtuemart_order_id = o.virtuemart_order_id)

LEFT JOIN #__virtuemart_orderstates AS os ON (os.order_status_code = o.order_status)

LEFT JOIN #__virtuemart_order_userinfos AS ou ON (ou.virtuemart_order_id = o.virtuemart_order_id)

LEFT JOIN #__virtuemart_userfield_values AS uv ON (uv.fieldvalue = ou.provincia)

WHERE (o.order_status = 'U' OR o.order_status = 'C' OR o.order_status = 'S') AND pc.virtuemart_campaign_id = '133' AND ou.address_type = 'ST' ORDER BY o.virtuemart_order_id ASC

Now, y remove from the query "AND ou.address_type = 'ST'" and delete the duplicates from the result with a foreach, but I would like to do it all in the same query

Answer 1

One method is if 'Type' is 'ST' include it OR if your table has a unique row (e.g for id 2 in your case) then also include it.

SELECT * FROM table1 t1 
WHERE t1.TYPE='ST' OR
t1.ORDER_ID IN (select ORDER_ID from table1 group by ORDER_ID having  count(*)=1 )

Though it has nested query but will be easy to implement considering you don't have too much data.

Answer 2

Here is another way to get your desired output by using SUBSTRING_INDEX over GROUP_CONCAT

SELECT ORDER_ID
,SUBSTRING_INDEX(GROUP_CONCAT(`TYPE` ORDER BY `TYPE` DESC),',',1) `TYPE` 
,SUBSTRING_INDEX(GROUP_CONCAT(`ADDRESS` ORDER BY `TYPE` DESC),',',1) `ADDRESS` 
FROM t
GROUP BY ORDER_ID 

Fiddle Demo

Answer 3

select t1.*
from your_table t1
join
(
  select order_id, max(type) as type
  from your_table
  group by order_id
) t2 on t1.order_id = t2.order_id and t1.type = t2.type