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Finding duplicate entries in a "smart" way - by comparing first two words

What is the best way to compare two entries in a single table where
the two fields are "almost" the same?

For example, I would like to write a query that would compare the
first two words in a "company" field. If they are the same, I would
like to output them.

For example, "20th Century" and "20th Century Fox" in the company
field would be the same.

How do I do this? Do I need to use a cursor? Is it as simple as using
Jul 20 '05 #1
2 1853
Here's an example:


INSERT INTO Sometable VALUES ('20th Century')
INSERT INTO Sometable VALUES ('20th Century Fox')
INSERT INTO Sometable VALUES ('Something Else')

SELECT company
FROM Sometable AS S
(SELECT first_two_words
(SELECT company,
CHARINDEX(' ',company+' ',CHARINDEX(' ',company)+1))
AS first_two_words
FROM Sometable) AS X
GROUP BY first_two_words
ON T.first_two_words =
LEFT(company,CHARINDEX(' ',company+' ',CHARINDEX(' ',company)+1))

David Portas
Please reply only to the newsgroup
Jul 20 '05 #2
>> a query that would compare the first two words in a "company"
field [sic]. If they are the same, I would like to output them. <<

Please post DDL, so that people do not have to guess what the keys,
constraints, Declarative Referential Integrity, datatypes, etc. in
your schema are. Sample data is also a good idea, along with clear

company CHAR(35) NOT NULL,

SELECT F1.foo_key, F2.foo_key
FROM Foobar AS F1, Foobar AS F2
WHERE CHARINDEX(F1.company, F2.company) = 1
AND F1.foo_key < F2.foo_key;
Jul 20 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

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