Dynamics AX Query framework

This is a very important diagram which details the hierarchy of the query classes that are available in Dynamics AX to access data.

Eg
public void myQuery2()

{
Query q;
QueryRun qr;
QueryBuildDataSource qbd;
QueryBuildRange qbr;
;

q = new Query();
qbd = q.addDataSource(TableNum(CustTable));
qbr = qbd.addRange(FieldNum(CustTable, AccountNum));
qbr.value('4005');
qbd.addSortField(FieldNum(CustTable, Name));
qr = new QueryRun(q);
qr.prompt();
pause;
}