RE: table join

From: Jim Silverman <jsilverman_at_Solucient.com>
Date: Wed, 1 Feb 2006 16:14:22 -0500
Message-ID: <2D1EFB433A527D4681B80C94B71E359804095A2D@aaexchange01.HEALTH.AD>

You concatenate two columns in the WHERE clause the same way you do so in the SELECT clause:

...

		where A.Lastname || A.Firstname = B.Lastname-Firstname


		...

I'm not sure if I have the column names exactly correct, but you should get the idea.

Note that this expression in the WHERE clause will likely preclude the use of indexes on either of the columns in table A, unless you use function-based indexes.

---

Jim Silverman
Senior Systems Database Administrator
Solucient, LLC
Telephone: 734-669-7641

FAX:            734-930-7611 
E-Mail:         jsilverman_at_solucient.com 

		From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Roger Xu
		Sent: Wednesday, February 01, 2006 4:07 PM
		To: Oracle-L_at_Freelists. Org (E-mail)
		Subject: table join

		Table A:
		Lastname (Mike)
		Firstname (Johnson)
		Phone(323-442-5678)
		 
		Table B:
		Lastname-Firstname(MikeJohnson)
		StreetAddress(1242 Main St.)
		Zip(76222)
		 
		How do I join these two tables?
		 
		select
B.Lastname-Firstname,A.Phone,B.StreetAddress,B.Zip
		from A,B
		where B.Lastname-Firstname = A.Lastname + A.Firstname
		 
		Basically, how to concatenate two fields in the where

clause?                  

                Thanks,                  

                Roger

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Received on Wed Feb 01 2006 - 15:14:22 CST