How to get the child table records?

Hi All,

I am getting the parent table record from child table record, but i don't know how to get the child table records from parent table record.

For example:

purchline.purchtable() //We can get the purchtable

In my scenario,

purchline localpurchline;

purchline = purchtable.purchline.getfirst();

// I don't know is it possible or not. I don't know is there any other option available in AX 2012.

Mostly i am using like the below code:

select * from purchline where purchline.purchid == purchtable.purchid;

Thanks for advance,

Hari