need logic to retrieve common fields in two internal tables

Hi,

I need to get the common data from the internnal table IT_BSEG and IT_ZFI_CSHLW_DIRE tables please help me out in sorting out this porblem.

the fields in IT_BSEG are Account number,Profit center,company code,document type etc.

where as the fields in IT_CSHFLW_DIRE are Account number from,Account number to,company code from,company code to and profit center.

so how to check whether a record which is in It_BSEG,exists in IT_CSHFLW_DIRE..?

Thanks,

Kumar