public SelectExtender::join($table, $alias = NULL, $condition

Allow the use of different database servers using the same code base. Overview Drupal's database abstraction

protected Connection::doEscape($string)

General class for an abstracted DELETE operation. Hierarchy class \Drupal\Core\Database\Query\

public StatementEmpty::fetchAll($mode = NULL, $column_index = NULL

public Select::preExecute(SelectInterface $query = NULL)

public SelectExtender::notExists(SelectInterface $select)

A processed copy of the database connection information from settings.php. Type:

public SelectExtender::escapeField($string)

public Schema::createTable($name, $table) Create