Slowly Changing Dimensions are those whose data are not fixed.
SCD types:
SCD type 1: Whose data is not fixed.
Historical data are not saved. Data keeps on changing.-> Current Data
SCD type 2: Whose data is fixed and also save historical data.
SCD type 3: Like SCD type 2 only but save historical data in another table. In one table data will updated and in another table historical data will be there. Depends what we are going to use a DWH or Database.
SCD types:
SCD type 1: Whose data is not fixed.
Historical data are not saved. Data keeps on changing.-> Current Data
SCD type 2: Whose data is fixed and also save historical data.
SCD type 3: Like SCD type 2 only but save historical data in another table. In one table data will updated and in another table historical data will be there. Depends what we are going to use a DWH or Database.