Rachel Rodriguez [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Hi!
I have a one-to-many relationship between two tables
(table1 and table3) with a linking table between
them (table2):
table1: table2
+---++ +---++
|id | f_name | |id | emailID|
+---++ +---++
| 1 | bill | | 1 | 1|
| 2 | john | | 1 | 4|
| 3 | diana | | 1 | 3|
| 4 | victor | | 2 | 2|
| 5 | renata | | 4 | 5|
+---++ +---++
table3
++-+
|emailID | email |
++-+
| 1| [EMAIL PROTECTED]|
| 2| [EMAIL PROTECTED] |
| 3| [EMAIL PROTECTED] |
| 4| [EMAIL PROTECTED] |
| 5| [EMAIL PROTECTED] |
++-+
Hi Rachel,
if you know that you will always have a one to many relationship and never a
many to many relationship you don't need table2 at all. Just add column 'id'
to table three as the foreign key. This should make your life easier.
Regards, Torsten
I would like to write a query that matches table1.id
with records
from table3.emailID via the linking table (table2) and
then
assign each match to a variable.
Here is what I have:
$query = SELECT t3.email
FROM table3 AS t3
LEFT JOIN table2 AS t2
ON (t3.emailID = t2.emailID)
LEFT JOIN table1 AS t1
ON (t2.id = t1.id)
WHERE t1.id = 1;
$result = @myql_query($query, $db_connection);
$num = mysql_num_rows($result);
$email1 = ;
$email2 = ;
$email3 = ;
if ($num 0)
{
while ($row = mysql_fetch_array($result))
{
// do something here to assign
// $email1 = $row[email] and
// $email2 = $row[email], etc.
}
}
Of course, the problem I am having is as I am going
through the while loop, I am assigning $email1,
$email2, and so on the
same e-mail address.
I would like to get: $email1 = [EMAIL PROTECTED],
$email2 = [EMAIL PROTECTED], and $email3 =
[EMAIL PROTECTED]
I would prefer to do that rather than what I have seen
in most examples which is similar to the following:
// snippet of code
while ($row = mysql_fetch_array($result))
{
echoBill's email is $row[email].;
}
// end of snippet
Any assistance is greatly appreciated.
Thanks,
Rachel
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