select([$select = '*'[, $escape = NULL]])

drop_database($db_name)

display_error([$error = ''[, $swap = ''[, $native = FALSE]]])

or_where_not_in([$key = NULL[, $values = NULL[, $escape = NULL]]])

drop_column($table, $column_name)

row_object([$n = 0])

class CI_DB_result result([$type = 'object'])

flush_cache()

create_table($table[, $if_not_exists = FALSE[, array $attributes = array()]])

rename_table($table_name, $new_table_name)