Dear Experts

Table1 has following indexing
index on dtoc(date,1) + alltrim(type)+str(voucher,4) to abc

Data in Table1 is as

date---Voucher-type-amount
9/6/2008---1---SR---500
9/6/2008---1---SR---600
9/6/2008---2---SR---200
9/6/2008---2---SR---300
10/6/2008--1---SR---400
10/6/2008--1---SR---700
10/6/2008--1---SC---350
10/6/2008--1---SC---200

I want to display empty DATE, VOUCHER and TYPE fields where date+type+voucher is same

Following data view is required

date---Voucher-type-amount
9/6/2008---1---SR---500
--------------------------600
9/6/2008---2---SR---200
--------------------------300
10/6/2008--1---SC---350
--------------------------200
10/6/2008--1---SR---400
--------------------------700

Please help