A)Getting rid of the proprietor's account from the Owner area won't alter the ownership in the table, but is likely to make the desk ownerless2.
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The SQL assertion in selection B is the correct one particular. The very best 5 customers are preferred according to the sum of their buys above the preceding 30 days utilizing the LIMIT key phrase. Results are filtered depending on the day utilizing the Exactly where clause, and final results are grouped depending on buyer ID using the Team BY clause.
In case you've diligently adhered towards the actions stated earlier mentioned plus your exam continues to facial area difficulties, there's no need to worry. It is possible to easily open up a case:
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Selection C is incorrect. It states that Databricks SQL may be utilised to query data from various resources, which can be also not the feature that is most handy for this activity.
Option A is correct. In the medallion architecture, data transformation and processing for analytics uses take place within the silver layer. The silver layer is located concerning the bronze layer, and that is accustomed to retail store Uncooked data, along with the gold layer, that's utilized to research data.
If most queries filter about the day column, Z-Buying the data by date would be certain that all data for a specific date variety is saved together, allowing for faster queries.
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Possibility D is incorrect. Because the gold layer in option C is the right response which is chargeable for offering a unified look at of data from many sources, this option cannot be genuine.
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Option A is incorrect. Materialized views are precomputed views that retail store the final results of a question and so are utilised to hurry up the performance of repeated queries. Even so, they do not make certain that the look at is always current with the most recent data while in the underlying tables.