On Mon, Jan 4, 2010 at 10:40 AM, Arthur Fuller wrote:
> The ProductPackages table is what is known as an associate table, and is
> used to implement a many-to-many relationship. You only need it if a given
> product can be in multiple packages. If not, then you can eliminate the
> associative tabl
The ProductPackages table is what is known as an associate table, and is
used to implement a many-to-many relationship. You only need it if a given
product can be in multiple packages. If not, then you can eliminate the
associative table and just add a PackageID column to the Products table.
There
On Sat, Jan 2, 2010 at 11:20 AM, Arthur Fuller wrote:
> Hi Victor.
>
> I think that the first thing you need to consider is whether a product can
> be in more than one package, and second is whether a package can be in
> another package. Also, I don't know why you need to auto-generate in either
>
On Sat, Jan 2, 2010 at 12:03 PM, prabhat kumar wrote:
> primary key
Oh! PK is primary key!
> a compound key is a key that consists of 2 or more attributes that uniquely
> identify an entity occurrence.
Thanks.
V
primary key is a candidate key to uniquely identify each row in a table. A
unique key or primary key comprises a single column or set of columns. No
two distinct rows in a table can have the same value (or combination of
values) in those columns. Depending on its design, a table may have
arbitraril
On Sat, Jan 2, 2010 at 11:20 AM, Arthur Fuller wrote:
> Hi Victor.
>
> I think that the first thing you need to consider is whether a product can
> be in more than one package, and second is whether a package can be in
> another package. Also, I don't know why you need to auto-generate in either
>
Hi Victor.
I think that the first thing you need to consider is whether a product can
be in more than one package, and second is whether a package can be in
another package. Also, I don't know why you need to auto-generate in either
case. It's pretty simple DDL.
Case 1: product can only be in one
Hi;
I have a table with products for a store to sell. I need to autogenerate
from code a table or series of tables into which I can enter (and from which
I can retrieve) the ID numbers of products which I am going to associate
together and their package price. Product associations will vary, in tha
