how to remove the Records from internal table based on another internal table

Hi Sap All.

I have got a requirement where iam selecting all materials from table MARA into Internal table itab.

after I fetch the data into Internal table itab from MARA, I have to do the check if those materials in tab has a 0 stock in table MBEW.

based on the field MBEW-LBKUM. if it is value '0' then I have to remove the respective material from itab.

can any one help me in finding the code for the above.

Regards.

Jagdish.