public Schema::dropPrimaryKey($table) Drop

public Insert::execute() Executes

public Select::orderBy($field, $direction = 'ASC')

public Schema::findTables($table_expression)

protected Schema::shortenIndex(&$index)

SQLite implementation of

public static Connection::open(array &$connection_options

public Select::forUpdate($set = TRUE) Add

public Schema::changeField($table, $field, $field_new, $spec, $keys_new

MySQL implementation of \Drupal\Core\Database\Connection