?
Solved

Find missing records in one table excluding cancelled items

Posted on 2016-08-25
4
Medium Priority
?
77 Views
Last Modified: 2016-08-25
Hi, I need to find all entries in table Hotelogix which are not existing in table Reservations but excluding cancelled records in Reservations. I have tried the following statement:

SELECT HotelogixReservations.[Group Id], HotelogixReservations.[Guest Name]
FROM HotelogixReservations LEFT JOIN QueryFull ON Ltrim(Rtrim(HotelogixReservations.[Group ID])) = QueryFull.[Group Reservation No]
WHERE (((QueryFull.[Group Reservation No]) Is Null)) OR QueryFull.Cancel=TRUE;

This almost works but gives an error in the case where I have the same reservation in Reservations table twice (once as cancelled and once as an open one). Not sure how to exclude any cancelled records in reservation? Thank you for any help..
0
Comment
Question by:mpim
4 Comments
 
LVL 1

Accepted Solution

by:
rquaglia earned 2000 total points
ID: 41770355
Hi!
looking at you question I suggest to try something like:
SELECT HotelogixReservations.[Group Id], HotelogixReservations.[Guest Name]
FROM HotelogixReservations
WHERE Ltrim(Rtrim(HotelogixReservations.[Group ID])) NOT IN (select [Group Reservation No] from QueryFull where Cancel<>TRUE);

Sorry, I can't try this but anyway I hope this helps.
0
 
LVL 41

Expert Comment

by:Sharath
ID: 41770457
Can you provide some sample data and expected result?
0
 
LVL 40

Expert Comment

by:PatHartman
ID: 41770612
The problem with your initial query is the criteria against the "right" table.  The subselect solves that problem.  However, if you are running the query in Access subselects are not well optimized so you could make a query that selects the "right" table and applies the criteria.  Then left join to that query.  Access would then apply the criteria to the "right" table PRIOR to performing the left join and that solves the problem.
1
 

Author Closing Comment

by:mpim
ID: 41770702
Great help! Thank you Michael
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

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

I have had my own IT business for a very long time. I started mostly with hardware and after about a year started to notice a common theme. I had shelves with software boxes -- Peachtree, Quicken, Sage, Ouickbooks -- and yet most of my clients were…
This shares a stored procedure to retrieve permissions for a given user on the current database or across all databases on a server.
How can you see what you are working on when you want to see it while you to save a copy? Add a "Save As" icon to the Quick Access Toolbar, or QAT. That way, when you save a copy of a query, form, report, or other object you are modifying, you…
Enter Foreign and Special Characters Enter characters you can't find on a keyboard using its ASCII code ... and learn how to make a handy reference for yourself using Excel ~ Use these codes in any Windows application! ... whether it is a Micr…
Suggested Courses

579 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