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Question 10What does this code do?1234567SELECT account_table.*   FROM (       SELECT *       FROM transaction.sf_model_feature_2014_01       WHERE day_of_week = 'Monday'       ) AS account_table   WHERE account_table.availability = 'NO'1 pointIt selects all columns from the table containing transactions on Monday and filters them to display only the transactions that are unavailable.It creates a temporary table named account_table containing all transactions from transaction.sf_model_feature_2014_01. It filters the transaction.sf_model_feature_2014_01 table to include only transactions on Fridays. It selects all data from the transaction.sf_model_feature_2014_01 table.

Question

Question 10What does this code do?1234567SELECT account_table.*   FROM (       SELECT *       FROM transaction.sf_model_feature_2014_01       WHERE day_of_week = 'Monday'       ) AS account_table   WHERE account_table.availability = 'NO'1 pointIt selects all columns from the table containing transactions on Monday and filters them to display only the transactions that are unavailable.It creates a temporary table named account_table containing all transactions from transaction.sf_model_feature_2014_01. It filters the transaction.sf_model_feature_2014_01 table to include only transactions on Fridays. It selects all data from the transaction.sf_model_feature_2014_01 table.

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Solution

This code does the following:

  1. It creates a temporary table named account_table that contains all transactions from the transaction.sf_model_feature_2014_01 table where the day_of_week is 'Monday'.

  2. Then, from this temporary table account_table, it selects all columns where the availability is 'NO'.

So, the final output will be all columns from the transactions that happened on 'Monday' and where the availability is 'NO'.

This problem has been solved

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