PHP / MySQL中的多个数据表？

Question

In asp.net, you can retrieve MULTIPLE datatables from a single call to the database. Can you do the same thing in php?

Example:

$sql ="select * from t1; select * from t2;";
$result = SomeQueryFunc($sql);
print_r($result[0]); // dump results for t1
print_r($result[1]); // dump results for t2

Can you do something like this?

Answer 1

This is called "multi-query." The mysql extension in PHP does not have any means to enable multi-query. The mysqli extension does allow you to use multi-query, but only through the multi_query() method. See http://php.net/manual/en/mysqli.multi-query.php

Using multi-query is not recommended, because it can increase the potential damage caused by SQL injection attacks. If you use multi-query, you should use rigorous code inspection habits to avoid SQL injection vulnerability.

Answer 2

This should be possible with newer MySQL and the mysqli (improved) php extension. I'm not sure if any DB abstraction layers support this.

See relevant MySQL docs and PHP docs .

Answer 3

PDOStatement::nextRowset()似乎就是你所追求的。

Answer 4

If you're using classic MySQL, you can't. You can create a function which will look like

function SomeQueryFunc($queries) {
    $queries = explode(';', $queries);
    $return = array();
    foreach($queries as $index => $query) {
        $result = mysql_query($query);
        $return[$index] = array();
        while($row = mysql_fetch_assoc($result)) {
           foreach($row as $column => $value) {
              $return[$index][$column] = $value;
           }
        }
    }
    return $return;
}

which will work as expected