Christopher,
Thanks for the reply.
Surrogate key solves the problem of having a record with a unique identifier
for a record. But I still have the following problems.
1. How do I link the previous records whenever a query is issued by the
user?
2. Please see my requirement below:
Scenario:
User inserts a record into transaction table. In the first record, Account
ID value is "HP" and he might insert a record into the child table (Or this
transaction may not insert a record into a child table). After some time,
the user queries the original record with the primary key and then changes
the value in the column - Account ID to "IBM". Now, the original
transaction record is NOT UPDATED. A record IS INSERTED with the new
values. Also, he might or might not insert a record into a child table with
this new values of primary key.
Now the user would query the transaction table with Account ID = IBM. But,
the user wants to get all the previous records also; in this case, he want
to see the record with Account ID = "HP" also. Also, he want to see the
related records from the child tables.
How do I do this?
Thanks,
Rao
-----Original Message-----
Sent: Friday, September 21, 2001 3:17 PM
To: Multiple recipients of list ORACLE-L
Then use a surrogate key, i.e. sequence number.
Numbers that change are not candidates for key, doing so introduces problems
in which you are having as well as others.
"Do not criticize someone until you walked a mile in their shoes, that way
when you criticize them, you are a mile a way and have their shoes."
Christopher R. Spence
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275
Fuelspot
73 Princeton Street
North, Chelmsford 01863
-----Original Message-----
Sent: Friday, September 21, 2001 2:30 PM
To: Multiple recipients of list ORACLE-L
In our case, we do not have any other columns --- 1. which could identify
uniquely a record and yet do not undergo a change.
Thanks,
Rao
-----Original Message-----
Sent: Friday, September 21, 2001 1:35 PM
To: Multiple recipients of list ORACLE-L
Generally it is bad practice to use columns in the primary key, which
change. They introduce many different problems.
"Do not criticize someone until you walked a mile in their shoes, that way
when you criticize them, you are a mile a way and have their shoes."
Christopher R. Spence
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275
Fuelspot
73 Princeton Street
North, Chelmsford 01863
-----Original Message-----
Sent: Friday, September 21, 2001 12:35 PM
To: Multiple recipients of list ORACLE-L
List,
OLTP application with 24x7 requirement. 300,000 records per day are inserted
into the transaction table. Environment: Solari 7. Oracle 817.
The transaction table layout.
Security ID
Account ID
Account Type
Trade Date
And other columns in this table.
In the above table, the primary key is -- Security ID + Account ID + Account
Type + Trade Date
There are many to one relationships built to other child tables from
Transaction Table
Scenario:
User inserts a record into transaction table. In the first record, Account
ID value is "HP" and he might insert a record into the child table (Or this
transaction may not insert a record into a child table). After some time,
the user queries the original record with the primary key and then changes
the value in the column - Account ID to "IBM". Now, the original
transaction record is NOT UPDATED. A record IS INSERTED with the new
values. Also, he might or might not insert a record into a child table with
this new values of primary key.
Now the user would query the transaction table with Account ID = IBM. But,
the user wants to get all the previous records also; in this case, he want
to see the record with Account ID = "HP" also. Also, he want to see the
related records from the child tables.
I tried with the idea of sequence number generation but it was failing.
Any ideas or suggestions are much appreciated.
Thanks,
Rao
Maheswara Rao,
Oracle DBA
SunGard Securities
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Rao, Maheswara
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).
