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A sales director has requested a report for individual team members within the division be developed. The director would like the report to be shared with all team members, but individual team members should not be identifiable within the report Which of the following access requirements would support the director's needs?
A stakeholder wants to see daily sales targets organized in a dashboard by country, state, city, and ZIP Code. Which of the following delivery considerations must a data analyst take into account when creating the dashboard?
An analyst is reporting on the average income for a county and is reviewing the following data:
Which of the following is the reason the analyst would need to cleanse the data in this data set?
A database administrator needs to increase performance on a large dimension table. Which of the following is the best way to accomplish this task?
Comprehensive and Detailed In-Depth
Improving the performance of large dimension tables in a database is crucial for efficient data retrieval and processing.
Partitioning: This technique involves dividing a large table into smaller, more manageable pieces called partitions. Each partition can be accessed and maintained separately, which enhances query performance and simplifies data management. Partitioning allows the database to read only the relevant partitions during a query, reducing the amount of data processed and speeding up response times.
Sampling: This involves analyzing a subset of data rather than the entire dataset. While useful for statistical analysis, it doesn't improve the performance of queries on the full dataset.
Windowing: This refers to functions that perform calculations across a set of table rows related to the current row, such as moving averages. It's useful for analytical purposes but doesn't inherently improve table performance.
Sorting: Organizing data in a specific order can aid in readability and certain query operations but doesn't significantly impact performance on large tables unless combined with indexing.
Therefore, partitioning is the most effective method to enhance performance on large dimension tables.
A data analyst is compiling a report that a Chief Executive Officer needs for an impromptu meeting. The report should include information on the previous day's performance. Which of the following reports should the analyst provide?
