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Posted by johnny on 10/08/04 11:38
David Haynes wrote:
hi David, thanks you made me realize that I already had a way to do
that simpler.
Ok , just to let you know, In my spare time I am making a sort of CRM
system.
So I have a script to create a contact list as a new table, the table
can have just an email field but also others such as name, address and
so on.
Anyway, when I create a new table I also add its name and a description
into another table which lists all the contact lists , so I could just
have to add a field to this "list of lists" and insert into that column
a comma separated string of all the fields of the new table .
Then , of course, I can print the fields I want to see the records,
delete, update one of them and so on...
It sound quite simple this way, isn't it ?
johnny
> johnny wrote:
> > hi all,
> >
> > I hope it is easier for you to answer than for me trying to explain
> > it...
> >
> > In a database I have some tables , each one has some mandatory fields
> > at the beginning and a couple at the end.
> > In the middle each table can have some additional fields from 0 to n
> > depending on how many fields have been inserted by who created the
> > table.
> >
> > Now, I need to set up a script which ,after receiving from a form the
> > table name, can print the first known fields,and all the additional
> > ones , but I don' t want it to show the last 2 columns of the table
> > because they store sensitive or useless contents.
> >
> >
> > any tips ?
> >
> > TIA
> >
> > johnny
> >
> Sounds like you have a database design problem more than a query
> problem. With the limited details you have provided, I would suggest
> something like the following:
>
> 1. have a table that contains the mandatory fields and the private ones.
> Let's call this one table 'A'.
> 2. make sure that each row in the table has a unique id (in mysql, look
> at the auto_increment feature)
> 3. create a second table, 'B', that will contain the arbitrary data.
> Each row in B will contain the argument value and the id from the row in
> table A that is relates to. So, you have 0 to n rows in B referencing
> the unique id of a row in A.
>
> This lets you have an arbitrary number of fields in B for each entry in
> A. Also, if you name the columns in A in your SQL query instead of
> using '*', you can have SQL ignore the private fields on the end.
>
> If this helps, I would suggest you spend a little time looking at
> database design and the capabilities of the SQL language.
>
> -david-
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