Solved

Query Help

Posted on 2014-01-13
5
210 Views
Last Modified: 2014-01-13
Hi All - need help writing a query for MSSQL - cannot seem to get it right

I have a table of orders o

order_id int pk
sub_total  money

I have another table of lineitems l

lineitem_id int pk
order_id fk to o.orders_id
linetotal money

An there may be many lineitems in an order

I am trying to write a query that finds any order that has a sub total that is <> to the sum of its lineitems (linetotals).
0
Comment
Question by:ccleebelt
5 Comments
 
LVL 11

Accepted Solution

by:
Simone B earned 500 total points
ID: 39777076
Try this:

SELECT o.order_id, o.sub_total, SUM(l.linetotal) AS linetotal
FROM orders o
INNER JOIN lineitems l ON o.order_id = l.order_id
GROUP BY o.order_id, o.sub_total
HAVING o.sub_total <> SUM(l.linetotal)

Open in new window

0
 
LVL 65

Expert Comment

by:Jim Horn
ID: 39777087
You can use a <> in a JOIN clause to find non-matches.  

Copy-paste the below T-SQL into your SSMS, execute to verify it works for your question, then modify to meet your needs.
CREATE TABLE orders (order_id int, sub_total money)
CREATE TABLE lineitems (lineitemid int, order_id int, sub_total money)
GO

INSERT INTO orders (order_id, sub_total)
VALUES (1, 100), (2, 200), (3, 300) 

INSERT INTO lineitems (lineitemid, order_id, sub_total) 
VALUES 
	-- 1 is good 
	(1, 1, 30), 
	(2, 1, 70), 
	-- 2 is bad
	(3, 2, 42), 
	(4, 2, 99), 
	(5, 2, 86), 
	-- 3 is good
	(6, 3, 100), 
	(7, 3, 75), 
	(8, 3, 125) 

SELECT o.order_id, o.sub_total, l.sub_total
FROM orders o
   JOIN (SELECT order_id, SUM(sub_total) as sub_total FROM lineitems GROUP BY order_id) l ON o.order_id = l.order_id AND o.sub_total <> l.sub_total

Open in new window

0
 

Author Closing Comment

by:ccleebelt
ID: 39777495
Ah.  I was so close.  Thanks!
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 39777554
I would do it this way:
SELECT  o.order_id,
        o.sub_total
FROM    orders o
        INNER JOIN (
                    SELECT  order_id,
                            SUM(linetotal) Sumlinetotal
                    FROM    lineitems
                    GROUP BY order_id
                   ) l ON o.order_id = l.order_id
WHERE   o.sub_total <> l.Sumlinetotal

Open in new window

0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 39777560
The reason I think my solution is better is because I see no reason to do a GROUP BY on the orders table.
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction SQL Server Integration Services can read XML files, that’s known by every BI developer.  (If you didn’t, don’t worry, I’m aiming this article at newcomers as well.) But how far can you go?  When does the XML Source component become …
Introduction In my previous article (http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/SSIS/A_9150-Loading-XML-Using-SSIS.html) I showed you how the XML Source component can be used to load XML files into a SQL Server database, us…
Using examples as well as descriptions, and references to Books Online, show the documentation available for datatypes, explain the available data types and show how data can be passed into and out of variables.
Viewers will learn how to use the SELECT statement in SQL and will be exposed to the many uses the SELECT statement has.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question