Question

Inner join help

Asked by: rolltide0

I am trying to pull related information from 2 tables that have no fields in common with each other. In order to do this I need to involve 2 other tables to "bridge" the gap. I've tried numerous times and have failed, so I decided to let the SQL experts here take a crack at it. The tables in question are as follows:

NAME
======
name, abrv

ORDER
======
order_num, charges, cost

Load_S
=======
load_number, abrv

load_d
========
load_number, order_number

Now the information that is required is the name from the Name table and cost,charges from the Order table.
My thinking was joining the Order and load_d by the order number, load_d and load_s by the load number, load_s and name by the abrv. The only problem is I do not know how to do that using my limited knowledge of SQL. I tried self researching and found several examples, but the best i could do was an infinite loop. If someone could show me a sql statement that can pull this off I could die happy.

Thanks in advance


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Asked On
2008-05-20 at 11:24:19ID23418301
Tags

Oracle

,

8i

Topics

Oracle 8.x

,

SQL Query Syntax

,

Oracle Database

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: dsackerPosted on 2008-05-20 at 11:30:32ID: 21608848

I'm assuming this is Oracle 8i (since you have that as a tag *grin*). Try the code below.

select	NAME.name,
	ORDER.charges,
	ORDER.cost
from	NAME,
	ORDER,
	Load_S,
	Load_D
where	NAME.name = Load_S.abrv
and	Load_S.load_number = Load_D.load_number
and	Load_D.order_number = ORDER.order_num

                                              
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by: sdstuberPosted on 2008-05-20 at 11:52:46ID: 21609072

is there exactly one name for each order, after jumping through the 3 other tables to get there?

if so, try this...

select o.charges,o.cost,
(select n.name from name n., load_s s, load_d d
where n.abrv = s.abrv
and d.load_number = s.load_number
and d.order_number = o.order_num) name
from order o


if there is potentially more than one, then use the query posted by dsacker with this small correction...

select      NAME.name,
      ORDER.charges,
      ORDER.cost
from      NAME,
      ORDER,
      Load_S,
      Load_D
where      NAME.abrv = Load_S.abrv
and      Load_S.load_number = Load_D.load_number
and      Load_D.order_number = ORDER.order_num
 


 

by: rolltide0Posted on 2008-05-20 at 12:13:17ID: 21609305

My problem was as plan as the nose on my face. in the joining statements, I was putting  commas before the word "and" and since there was more than one, my infinite loops were not infinite as I thought. Man I need a vacation.

Thanks for the help d, that hit the spot.

20120131-EE-VQP-002

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