home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!coplex!tfd!ken.lundberg
- From: ken.lundberg@tfd.coplex.com (Ken Lundberg)
- Newsgroups: comp.databases
- Subject: Help with a structure and
- Message-ID: <477.133.uupcb@tfd.coplex.com>
- Date: 21 Jan 93 21:22:00 GMT
- Distribution: world
- Organization: Ky/In PC User's Group - Louisville, KY - 502-423-8654
- Reply-To: ken.lundberg@tfd.coplex.com (Ken Lundberg)
- Lines: 42
-
- TO: jdrew@ucsvax.sdsu.edu
-
- FR: ken.lundberg@coplex.com
-
- On Wed, 20 Jan 1993, Joe Drew of San Diego State wrote:
-
- >...I'd like to set-up a database application where a user could request a
- >specific data series as well as have the option to select it for only a
- >specific time period. For example:the consumer price index from 1980 to
- >the most current period. Moreover, the user would most likely select
- >other series that may start and end at different times. I'd like them to
- >be able to end up with ONE table that includes all the data they selected...
-
- Joe, any PC database package will do the trick so far as you've described
- the system. A few of points from personal experience may save you time:
-
- 1. Proper design will keep hair on your head, and users out of your face.
- Put MUCH time into design, and don't start coding too soon.
- 2. Proper Indexing = Easy data retrieval. By "proper," I mean effective.
- Database systems live or die by indices.
- 3. Multiuser considerations come to mind, but that's for another article.
-
- Your users need to select data by: a (user defined) range (ex: date)
- and: meeting (user defined) criteria...
-
- This is a normal request for any database system. How 'bout this for a
- record layout?
-
- date * (other data fields) CPI (other data fields)
- ------- --------------------- ------- ---------------------------------
- ------- --------------------- ------- ---------------------------------
- ------- --------------------- ------- ---------------------------------
- ------- --------------------- ------- ---------------------------------
- * this field would be indexed.
-
- If you set up this simple data file, indexing on date, and storing the CPI
- that was effective on that date, any user could easily use a query
- facility to extract a data "series" that meets their criteria. This could
- be stored in a table, printed, sent to Lotus, etc. Does this help?
-
- * SLMR 2.1a * ------------------------------------------Ken-in-Kentucky
-
-