SQL writing format - php

Question

I would like to inner join to tables with sql like this:
$check_unscored = "select * from [user]
INNER JOIN [tenderrc]
on [user].[id] = [tenderrc].[userid]";
$result_unscored = mssql_query($check_unscored, $s);
while ($record_unscored = mssql_fetch_array($result_unscored))
{
$id = $record_unscored['id'];
$name = $record_unscored['name'];
$userid = $record_unscored['userid'];
$touser = $record_unscored['touser'];
$id = $record_unscored['id'];
$username = $record_unscored['username'];
$password = $record_unscored['password'];
}
I observed that a key name column called "id" exists in both table, and therefore $id = $record_unscored['id']; would be overwritten;
I tried $id = $record_unscored['user.id']; but it's not working! Actually how shall I specify the table name as well?

Answer 1

Use aliases:
$check_unscored = "
SELECT
u.id
, u.name
, u.userid
, u.touser
, t.id AS tender_id --- column alias
--- to remove duplicate names
, t.username
, t.password
FROM [user] AS u --- table alias her
INNER JOIN [tenderrc] AS t --- and here
ON u.[id] = t.[userid]
";

Answer 2

you could create a alias field etc
if you wont id from user you could use something like this
select [user].[id] as 'userid', [tenderrc].[*] from ...
I come from mySql world but i think its managable this way
and later access it this way
$id = $record_unscored['userid'];

Answer 3

You could do this using this function
http://hu2.php.net/manual/en/function.mssql-fetch-field.php
which can provide "column_source - the table from which the column was taken".
Example code:
$result = mssql_query("....");
$check_unscored = "
SELECT *
FROM [user]
INNER JOIN [tenderrc] ON [user].[id] = [tenderrc].[userid]";
$rows = fetch_multitable( mssql_query( $check_unscored, $s ));
foreach( $rows as $row ){
echo $row->user['id'];
echo $row->tenderrc['id'];
}
function fetch_multitable( $result ){
$fields = mssql_num_fields( $result );
$infos = array();
for( $i=0; $i < $fields; $i++ ){
$fieldinfo = mssql_fetch_field( $r, $i );
$infos[ $i ] = (object)array(
'table'=> $fieldinfo -> column_source
,'name' => $fieldinfo -> name
);
}
$rows = array();
while( $raw = mssql_fetch_row( $r )){
$row = array();
foreach( $raw as $i => $v ){
$info = $infos[ $i ];
$row[ $inf->table ][ $inf->name ] = $v;
}
$rows[] = (object)$row;
}
return $rows;
}