Chris,
Yes, I've done it with a single date column as you specified in the second
approach.
The following bit of code may be helpful:
declare
v_claim_date date := to_date('02/01/2002','mm/dd/yyyy');
v_rate_code rate.rate_code%type := 'ABC';
v_rate_date date;
begin
select min(effective_date) into v_rate_date
from rate
where rate_code = v_rate_code
and effective_date between v_claim_date and
to_date('12/31/9999','mm/dd/yyyy');
end;
/
Returning no row indicates that the claim is not covered.
This SQL is probably not optimal, but illustrates the idea.
It's much easier for users and developers to juggle a single
date per record than try to ensure the the start_dates and end_dates
are all in sync.
Jared
"Grabowy, Chris" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
04/22/2002 04:54 PM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Design question: EFFECTIVE_?_DATE in a RATE table...
A design question, my RATE table looks something like this....
SQL> desc rate
Name
Null? Type
------------------------------------------------------------------------
-------- -----------------
RATE_CODE
NOT NULL CHAR(2)
RATE_EFFECTIVE_START_DATE
NOT NULL DATE
RATE_EFFECTIVE_END_DATE
NOT NULL DATE
.
.
those are the PK fields...and the SQL to query the table is easy. I am
trying to determine if I can "tighten up" the table, like this...
SQL> desc rate
Name
Null? Type
------------------------------------------------------------------------
-------- -----------------
RATE_CODE
NOT NULL CHAR(2)
RATE_EFFECTIVE_DATE
NOT NULL DATE
I just haven't been able to code the right SQL.
Has anyone else taken this approach?
Sorry for these design questions, I am just being very anal about every
table, PK column and index, before we dive into development and everything
becomes "hard coded".
TIA!!!!
Chris
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Grabowy, Chris
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author:
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
