need query help in batch

Hi Experts

I need to track the no of days And Quantity  to track from purchase order to issue

purchase order -------------grpo-------------batch -----  Ap Invoice--------issue

For Ex: I have purchased a fabric on x date and Grpo has done on y date using batch and similarly invoice has done on z date and issued on some N Date

Opor.DocDate,Por1.Dscription,Por1.Quanity,OPDN.DocDate,PDN1 .Quantity,OBTN .Batch ,OBTN .Date,OPCH.DocDate,PCH1.Quanity,OIGE.DocDate,

IGe1.Quantity,Days Diff( Po to Issue)

please write a query based on this and help me its very urgent

Regards

Jenny