Query in ABAP HR

Hi folks,

i am new to ABAP HR. i want to fetch data from a infotype with some conditions.

The conditions are to select data from PA9003 wehre AEDTM between period selection and zz_trip_no is not initial and subty = 2 or 3 or 4. Could any body help me how to fetch data by using 'read_infotype' statement or 'provide * from' statement.....thnks in advance, pls help me...

Ram.