[04/Sura/08]

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Download our mobile app to listen on the go

Get App

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)

True (A) Signup and view all the answers

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

False (B) 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)

False (B) Signup and view all the answers

Match the following database elements with their recommended usage:

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 Signup and view all the answers

Match the following recommendations with their associated statements:

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 Signup and view all the answers

Match the following considerations with their corresponding database strategies:

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 Signup and view all the answers

Flashcards are hidden until you start studying