示例PDO查询不起作用

Question

I have a simple SQL query that is not working. I have tried everything I know to fix this query, but to no avail.

$Data = $connection->prepare("SELECT * FROM EXAMPLE");

The table on the database exists, and the connection to the database is set properly.

I have also tried this:

$Data = $connection->prepare("SELECT ID FROM EXAMPLE WHERE EXAMPLE1=:EXAMPLE1 ");
$Data->execute(array(
   ':EXAMPLE1' => $EXAMPLE1,
));

Answer 1

If your connection is fine..

$Data=$connection->prepare("SELECT ID FROM EXAMPLE WHERE EXAMPLE1 = :EXAMPLE1");
$Data->execute(array(
   ':EXAMPLE1' => $EXAMPLE1,
));
$result = $Data->fetchAll();

Or

$result = array();
$sql = "SELECT ID FROM EXAMPLE WHERE EXAMPLE1 = {$EXAMPLE1};";
foreach ($connection->query($sql) as $row) {
    $result[] = $row;
}