drop_column($table, $column_name)

insert([$table = ''[, $set = NULL[, $escape = NULL]]])

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

trans_complete()

join($table, $cond[, $type = ''[, $escape = NULL]])

not_group_start()

group_end()

like($field[, $match = ''[, $side = 'both'[, $escape = NULL]]])

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

escape($str)