public Merge::expression($field, $expression, array $arguments = NULL)

The fields by which to order this query. This is an associative array. The keys are the fields to order, and the value is the direction to order

public Select::countQuery() Get the

public ConditionInterface::isNull($field)

protected Schema::introspectSchema($table)

public Connection::escapeDatabase($database) Escapes

public Connection::escapeField($field) Escapes

protected Schema::buildTableNameCondition($table_name, $operator = '='

public Condition::notExists(SelectInterface $select)

public Connection::serialize()