Solved

How to select records that are in one database but not the other

Posted on 2008-06-09
3
168 Views
Last Modified: 2010-03-20
I have two tables with some data. They each share a common characteristic (a customer id field).
I would like to create a SQL statement that would select everything from table A that is not in table B.
For example if table A has the id's 1,2,3,4 and table B has the values of 1,4; I only want to get rows 2 and 3
from table A out of the query. I have looked at an inner join but it seems to only do the opposite of what I want...
How do I get distinct records from table A that are NOT in table B?
Thank's in advance.
0
Comment
Question by:jpwallen
3 Comments
 
LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 250 total points
ID: 21746619
it will be a variant of the LEFT OUTER JOIN. the trick is the WHERE clause:
SELECT a.*
  FROM tableA a
  LEFT OUTER JOIN tableB b
    ON a.id = b.id
 WHERE b.id IS NULL

Open in new window

0
 
LVL 4

Expert Comment

by:albuitra
ID: 21746620
select * from table A where not exists (select b.* from b where a.field = b.field )
0
 
LVL 2

Expert Comment

by:knowledge_riot
ID: 21749363
You could also try:

SELECT DISTINCT CustomerId from TableA where CustomerId not in (SELECT CustomerId from TableB)
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

The Delta outage: 650 cancelled flights, more than 1200 delayed flights, thousands of frustrated customers, tens of millions of dollars in damages – plus untold reputational damage to one of the world’s most trusted airlines. All due to a catastroph…
As technology users and professionals, we’re always learning. Our universal interest in advancing our knowledge of the trade is unmatched by most industries. It’s a curiosity that makes sense, given the climate of change. Within that, there lies a…
Viewers will learn how to use the SELECT statement in SQL to return specific rows and columns, with various degrees of sorting and limits in place.
Viewers will learn how to use the SELECT statement in SQL and will be exposed to the many uses the SELECT statement has.

815 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

Need Help in Real-Time?

Connect with top rated Experts

8 Experts available now in Live!

Get 1:1 Help Now