--- [EMAIL PROTECTED] wrote:
>
> > Hello, I'm new to MySQL and have ran into a
> problem in
> > designing my database. I have a table of items, A,
> and
> > each item should have any number of other records
> from
> > another table, B, associated with it. I also need
> to
> > have any number of records from table C associated
> > with table B. They need to be associated in such a
> way
> > that I can quickly find out what is associated
> with a
> > record in table A, as well as what is associated
> with
> > a record in table B. In other words, how do I
> store an
> > array of pointers? What's the best way to do this?
> I
> > couldn't find anything relevant in the docs.
>
> I'm not sure that I've understood correctly, but
> perhaps :
>
> create table A (
> aid int unsigned not null auto_increment,
> value char(1000),
> key idxaid (aid)
> );
> create table B (
> bid int unsigned not null auto_increment,
> aid int unsigned not null default -1,
> value char(1000),
> key idxbid (bid),
> key idxaid (aid)
> );
> create table C (
> cid int unsigned not null auto_increment,
> bid int unsigned not null default -1,
> value char(1000),
> key idxcid (cid),
> key idxbid (bid)
> );
>
> That way, reading data from Table B tells you about
> the parent,
> likewise for C.
Thanks for you reply..but I want to be able to find
the list of the children, not parents. For example:
In table A: foo quux (separate from B's quux)
/ \ /
In table B: baz quux bar
/|\ \
In table C: w x y z
Each table's rows (except for table C) should be
allowed to have any number of children, and I should
be able to get a list of all the children of a parent.
In C, I would do it like this:
typedef struct _A
{
int value;
B* children[100];
} A;
typedef struct _B
{
int value;
C* children[100];
}
typedef struct _C
{
int value;
}
How would I do this in MySQL?
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