sqlite merge forespørgelser

$sql = "select database1.signal.*, database2.signal.* FROM database1.signal JOIN database2.signal ON database1.signal.xx = database2.signal.yy";
$reshis = $dbHIS->query($sql);
while($row = $reshis->fetchArray()){
  print_r($row);
}

<?php
define('DIR', 'C:\\work\\');

// setup
function credb($dbnam, $start, $end) {
    $db = new SQLite3(DIR . $dbnam);
    $db->exec('CREATE TABLE t (f INTEGER NOT NULL PRIMARY KEY)');
    for($i = $start; $i <= $end; $i++) {
        $db->exec("INSERT INTO t VALUES($i)");
    }
    $db->close();
}
credb('gl.db', 1, 3);
credb('ny.db', 4, 6);

// test single
function test($dbnam) {
    $db = new SQLite3(DIR . $dbnam);
    $q = $db->query('SELECT f FROM t');
    while($row = $q->fetchArray()) {
        echo $row['f'] . "\r\n";
    }
    $db->close();
}
test('gl.db');
test('ny.db');

// test multi
$db = new SQLite3(':memory:');
$db->exec("ATTACH '" . DIR . "gl.db' AS gl");
$db->exec("ATTACH '" . DIR . "ny.db' AS ny");
$q = $db->query('SELECT f FROM gl.t UNION SELECT f FROM ny.t');
while($row = $q->fetchArray()) {
    echo $row['f'] . "\r\n";
}
$db->close();

?>