RE: Single Code Table or Separate Code tables dilemma

From: Mandar Ghosalkar <MandarG_at_gsr-inc.com>
Date: Fri, 23 Mar 2001 17:53:21 -0800
Message-ID: <F001.002D6EE8.20010323175630@fatcity.com>

CREATE TABLE I_DONT_LIKE_MASTER
( CODE_TYPE VARCHAR2(4) NOT NULL,

CODE_VALUE VARCHAR2(3) NOT NULL,
CODE_DESC VARCHAR2(20) ,
PRIMARY KEY (CODE_TYPE, CODE_VALUE) )

SPLT    N       SDFLJDSL
SPLT    FP      SDFSDKFDS
SPLT    OBG     SFLSDJFSD
TYPE    MD      SDFLSDFSDF
TYPE    FP      SDFJDSFJ
TYPE    OPH     SDLFJDSKF

CREATE TABLE DOCTOR
(.....,

SPECIALITY_CODE_TYPE    VARCHAR2(4),
SPECIALITY_CODE_VALUE   VARCHAR2(3),
TYPE_CODE_TYPE          VARCHAR2(4),
TYPE_CODE_VALUE         VARCHAR2(3),

.....,
foreign key (SPECIALITY_CODE_TYPE,SPECIALITY_CODE_VALUE) references I_DONT_LIKE_MASTER,
foreign key (TYPE_CODE_TYPE, TYPE_CODE_VALUE ) references I_DONT_LIKE_MASTER )

D1      SPLT    N       TYPE    OPH
D2      SPLT  N TYPE    MD

but u can also create surrogate key and make (CODE_TYPE, CODE_VALUE) as alternate key (unique) and then reference the surrogate key in ur doctor table, instead of two cols as one foreign key -MANDAR -----Original Message-----
Sent: Friday, March 23, 2001 7:31 PM
To: Multiple recipients of list ORACLE-L

I'm still not quite sure I understand the "single code table" business. Let me give an example (taken from a live example at one of my previous jobs). I have a table called DOCTOR that has two fields - SPECIALTY and TYPE. The acceptable values for SPECIALTY are N, FP, OBG, etc... The acceptable values for TYPE are MD, FP, OPH, etc... If I have a "single code table", how can I create a Foreign key constraint on the SPECIALTY column and another one on the TYPE column?

Jacques R. Kilchoer
(949) 754-8816

Quest Software, Inc.
8001 Irvine Center Drive
Irvine, California 92618
U.S.A.
http://www.quest.com

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-- 
Author: Mandar Ghosalkar
  INET: MandarG_at_gsr-inc.com

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Received on Fri Mar 23 2001 - 19:53:21 CST