[04/Sura/08]
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Questions and Answers

What type of tables provide the current snapshot and 'end of all times'?

  • GSR_type tables
  • Data Vault queries
  • PIT tables (correct)
  • Effectivity satellites
  • Which PostgreSQL feature should be avoided due to performance issues?

  • PIT tables
  • Window function (correct)
  • Effectivity satellites
  • GSR_ledts
  • What type of queries require the use of effectivity satellites?

  • Data Vault queries (correct)
  • GSR_type queries
  • Greenplum queries
  • PIT table queries
  • Data Vault queries require the use of effectivity satellites, hubs, and links. (True/False)

    <p>True</p> Signup and view all the answers

    PIT tables only provide the current snapshot and not historical data. (True/False)

    <p>False</p> Signup and view all the answers

    It is recommended to use PostgreSQL's window function for querying gsr_ledts due to its speed. (True/False)

    <p>False</p> Signup and view all the answers

    Match the following database elements with their recommended usage:

    <p>Effectivity satellites = Data Vault queries PIT tables = Providing current snapshot and 'end of all times' gsr_type = 0 = Always query for this in PIT tables PostgreSQL's window function = Avoid using for querying gsr_ledts</p> Signup and view all the answers

    Match the following recommendations with their associated statements:

    <p>Use of effectivity satellites, hubs, and links = Data Vault queries require Querying for gsr_type = 0 = Always recommended in PIT tables Avoidance of complex PostgreSQL features = Expect migration to Greenplum Prefer PIT over gsr_ledts for querying = Due to slow performance of PostgreSQL's window function</p> Signup and view all the answers

    Match the following considerations with their corresponding database strategies:

    <p>Avoiding gsr_ledts = Prefer PIT over Migration to Greenplum = Expectation for avoiding complex PostgreSQL features Usage of effectivity satellites (hubs/links) = Requirement for Data Vault queries PIT tables providing current snapshot and 'end of all times' = Functionality related to</p> Signup and view all the answers

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