Explanation/Reference:
Explanation:
To achieve the fastest loading speed for moving data into a data warehouse table, load data into a staging
table. Define the staging table as a heap and use round-robin for the distribution option.
Incorrect:
Not B: Consider that loading is usually a two-step process in which you first load to a staging table and
then insert the data into a production data warehouse table. If the production table uses a hash
distribution, the total time to load and insert might be faster if you define the staging table with the hash
distribution. Loading to the staging table takes longer, but the second step of inserting the rows to the
production table does not incur data movement across the distributions.
References:
https://docs.microsoft.com/en-us/azure/sql-data-warehouse/guidance-for-loading-data