What is the most effective method to get a single result on a database query?
Rather than my normal method??
Is there any benefit at all?
Just thinking it could reduce lines of coding, but if it makes a difference, I am interested in quicker methods.
$ads = "SELECT name FROM db WHERE id='x';";
$ads = $dbh->prepare($ads);
$ads->execute();
if($ads->rowCount() > 0){
while ($ad = $ads->fetch (PDO::FETCH_OBJ)){
$variable = $ad->name;
}
}
The ; on the end of the sql query statement is not needed when executing a query via php.
If the ‘x’ value is not dynamic, don’t use a prepared query. Just use the ->query() method.
Don’t reuse a variable for different meaning values.
Don’t use rowCount() with a SELECT query. If you read the documentation it is not guaranteed to work for a SELECT query for all drivers, resulting in non-portable code. Instead, just fetch the data and test if there is any fetched data.
Don’t use a loop to fetch what will at most be a single row of data.
If you set the default fetch mode to your desired value when you make the database connection, you won’t need to specify it in each fetch statement.
You can use the fetchColumn() method to fetch a single column from a single row of data.
You can chain method calls.
$sql = "SELECT name FROM db WHERE id='x'";
$variable = $pdo->query($sql)->fetchColumn();
// at this point $variable is either a false value, if there is no matching row, or it is the matching name value