To Find out no of Z_Programs, Z_Database tables, Z_BDC, Z_ABAP Query

Hi,

Is there any way to see the no of Z_programs,Z_Database tables, Z_BDC, Z_ABAP Query in my ECC system.

Is there any transaction code to find out the same.

If it is not there can anyone tell me the step by step procedure to know the same.

its urgent, thanks in advance,

Regards,

Mithun