total_queries()

count_all_results([$table = ''[, $reset = TRUE]])

primary($table)

insert_string($table, $data)

drop_table($table_name[, $if_exists = FALSE])

db_set_charset($charset)

reset_query()

select_min([$select = ''[, $alias = '']])

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

flush_cache()