count Github
	function counting number of records inside requested recordset.
	Default parameter is: $id = '*', $as_sql = false
	If parameter $as_sql = true return simple sql command, else - return query result
from('table')->count();max Github
	SQL aggregate MAX()
	Default parameter is: $pk = null, $as_sql = false
	If parameter $as_sql = true return simple sql command,	else - return query result
from('table')->max();min Github
	min SQL aggregate MIN()
	Default parameter is: $pk = null, $as_sql = false
	If parameter $as_sql = true return simple sql command,	else - return query result
from('table')->min();avg Github
	SQL aggregate AVG()
	Default parameter is: $pk = null, $as_sql = false
	If parameter $as_sql = true return simple sql command, else - return query result
from('table')->avg();sum Github
	SQL aggregate SUM()
	Default parameter is: $pk = null, $as_sql = false
	If parameter $as_sql = true return simple sql command, else - return query result
from('table')->sum();first Github
	Return first item from resultset
	Default parameter is: $select = null, $use_cache = false
	If parameter $use_cache = true return cached query result
from('table')->first();last Github
	Return last item from resultset
	Default parameter is: $select = null, $use_cache = false
	If parameter $use_cache = true return cached query result
from('table')->last();