This query uses tables in the Compustat Point-in-Time Backtest Package to show original values and any subsequent changes to a data item over time. It returns the datadate, pointdate, value and data code for the original and revised instances. The query represents an abbreviated time series in that it does not return all datadates and pointdates for the item: It only returns datadates and pointdates for when there is an original value or a change. Note:This query specifically identifies original values and changes to quarterly sales for GVKEY 001487.The mnemonic and GVKEY can be changed to run for other items and companies