• On the Criteria tab, select:


      Constituency, Constituent Code one of [the codes to be edited]

      AND Constituency, Date From not blank

       
    • On the Fields tab, select:


      Constituent Code, Constituent Code

      Constituent Code, Constituent Code Import ID

      Constituent Code, Constituent Import ID

       
    • Delete the rows with codes that should not be updated.
     
    • Add a column with the header DateFrom.
     
    • In the DateFrom column, add a ^ to all rows.
     
    • Save and close the CSV file.
       
    • On the General tab, select Update existing records.
     
    • Select all other appropriate options and complete the import process.