update returned_purchase set supplier_no = '?', supplier_invoice_no = '?', created_date = '?'
update returned_purchase set supplier_no = abcc, supplier_invoice_no = '?', created_date = '?'
update returned_purchase set supplier_no = abcc, supplier_invoice_no = dss, created_date = '?'
update returned_purchase set supplier_no = abcc, supplier_invoice_no = dss, created_date = ddddf???