Connecting Each row to another Table

Hi
This probably isnt the JDBC question but can some one tell me how to Connect each row of a column to another Table.
I have a Table with two columns Name and UserID. I want to connect each UserID to another Table. like User01 will be connected to another table called burn table for user01. User 02 will be connected to another table called burn table for user 02. Each table for user01 and user02 has 3 columns: CDName, EULA, License Key.
I read about primary and foreign keys but can some one give me a hint on this about how to start on it?
And if i get this done, then how would i execute a SQL query command so that I can read the data for each user. I am using java Servlets.
I am new sorry.
-bhaarat

i agree with you that making seperate table for each
user is terrible and i would be ashamed to present
this projec to anyone.
how do you think i should design this database other
than what i have suggested..
i might have alredy explained what the database is
doing but let me do that again..
1. There are about 150 or more CD's from MS.
2. Each user is able to burn a cd once only. for
example if user has already burned xp pro he cant burn
again.
3. there are about 600 or more users(thats why making
each table for each user is wrong, eventhough some one
else will be doing it, instead of me).
4. each cd has a license key associated with it.
please suggest me how i should do this database so its
not much of a hazzle and i dont have to pay some one
100 an hour so fix the problems lol.okay first i am going to list out the table designs and then I am going to provide some explanations
tblUser
username VARCHAR PRIMARY KEY
firstname VARCHAR
lastname VARCHAR
tblCD
cdname VARCHAR PRIMARY KEY
licensekey VARCHAR PRIMARY KEY
eula VARCHAR or TEXT
tblUserCD
username VARCHAR PRIMARY KEY
cdname VARCHAR PRIMARY KEY
licensekey VARCHAR PRIMARY KEY
so what's happening here...
well we have a table for users.. since we need a unique key i am using username... this could be the
name for someone uses to login to your system.
there is a different table that is list of all the cds. the primary key for this one is both the name and license together.
then there is a table that builds a relationship between the two.
in this scheme each user may download or whatnot each cd zero or one times. you can't put a second
download in because that will violate the primary key of tblUserCD
now let's look at some sample data
if the user table has this....
username----firstname----lastname
jsmith----------John----------Smith
aadams-------Audrey--------Adams
and the CD table has this
cdname----license----eula
Access-----12345----blah blah
Word--------12356----blah blah
Windows---99999---blah blah
then we do the following queries when John wants to get Access and Windows and Audrey wants to get Word and Access.
INSERT INTO tblUserCD(username,cdname,licensekey) VALUES('jsmith','Access','12345');
INSERT INTO tblUserCD(username,cdname,licensekey) VALUES('jsmith',Windows,'99999');
INSERT INTO tblUserCD(username,cdname,licensekey) VALUES('aadams','Word','12356');
INSERT INTO tblUserCD(username,cdname,licensekey) VALUES('aadams','Access','12345');
now if you want to get the list of program for any user (example John Smith) you just do this....
SELECT cdname FROM tblUserCD WHERE username='jsmith'
which gives you this
cdname
Access
Windows
there are several pluses to this design
1) as I alluded to earlier this design prevents you putting in the same cd and license key more than once for each user
2) You now can get a nice list of all the CD's easily.
SELECT cdname,licensekety FROM tblCD;
3) if you need to make any changes, like a persons username or more likely the cd stuff then it is easier to do so.. for example in your old design if you wanted to change Access to Access XP you would have to change EVERY table. in the new model you can do this in two queries.
UPDATE tblCD SET cdname='Access XP' WHERE cdname='Access' AND licensekey='12345';
UPDATE tblUserCD SET cdname='Access XP' WHERE cdname='Access' AND licensekey='12345';
(actually if you set up the keys properly and to cascade changes then you would just need the one query)
there is actually a theory for this sort of timesaving and error prevention work called normal form data.
for your further "enjoyment" may I suggest reading this http://databasejournal.com/sqletc/article.php/1443021
anyway hope this helps you out....
does this make sense to you?

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Message was edited by:
user569548

Hi,
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--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
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Message was edited by:
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satyaki>
satyaki>select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
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KP106A           15432 1234
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satyaki>
satyaki>Regards.
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