PostgreSQL - Object Relation Database

PostgreSQL - Object Relational Database from Mubashar Iqbal

Mysql Transactions

Mysql Transactions

Avoid inconsistency in the cases where the script terminates unexpectedly.

try {
  $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

  $dbh->beginTransaction();

  $dbh->exec("insert into staff (id, first, last) values (23, 'Joe', 'Bloggs')");
  $dbh->exec("insert into salarychange (id, amount, changedate)
      values (23, 50000, NOW())");

  $dbh->commit();
 
} catch (Exception $e) {

  $dbh->rollBack(); // roll back if error occured

  echo "Failed: " . $e->getMessage();
}