Which of the following is true of three-tier data worehouses

  • Once created, the data marts will directly receive their new data from the operational databases.
  • The data mart combines all the tables of the data warehouse.
  • The data marts are different groups of tables in the data warehouse.
  • Once created, the data marts will keep on being updated from the data warehouse at periodic times.
  • A data mart becomes a data warehouse when it reaches a critical size.

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Which of the following is true of three-tier data worehouses
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