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

close()

empty_table([$table = ''])

update_batch($table[, $set = NULL[, $value = NULL[, $batch_size = 100]]])

stop_cache()

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

insert_string($table, $data)

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

There are two ways to connect to a database: Automatically Connecting The “auto connect” feature will load

call_function($function)