Which statement about subqueries is correct?
Answer(s): C
Subqueries allow querying data within another SQL query without needing to create a separate table or view.They are commonly used in SELECT, WHERE, and FROM clauses to filter or compute intermediate results dynamically.
Which location can be used to determine the owner of a managed table?
Answer(s): A
In Databricks SQL, Catalog Explorer provides metadata details about tables, including the Owner field, which indicates who owns the managed table. This is the correct location to determine table ownership.
Which statement about visualizations is true?
Different types of visualizations (e.g., bar charts, line charts, scatter plots) help present data insights in unique ways, depending on the context and analytical goal. Choosing the right visualization enhances understanding and storytelling.
What describes the variance of a set of values?
Answer(s): D
Variance quantifies the spread or dispersion of a dataset by measuring how much each value deviates from the mean. A higher variance indicates more spread, while a lower variance suggests that the values are closer to the mean.
Which SQL standards does Databricks SQL use as its default SQL dialect?
Databricks SQL follows the ANSI SQL standard as its default SQL dialect. ANSI SQL ensures compatibility with standard SQL syntax and functions, making it easier for users familiar with traditional relational databases to work within Databricks SQL.
A data analyst is working in an organization that utilizes a multi-hop, medallion architecture. They have been tasked with creating a new Gold table from an existing Silver table.Which query is performing a hop from a Silver table to a Gold table?
In the medallion architecture, data moves through different stages:Bronze (Raw Data) - Ingested from sources.Silver (Cleaned & Processed Data) - Filtered, deduplicated, and structured.Gold (Aggregated & Business-ready Data) - Used for reporting and analytics.The correct query should create store_sales by aggregating sales data using SUM(sales), which is a transformation typically done in the Gold layer. It should process data from cleaned_transactions (a Silver table), making it a Silver Gold transformation.
What is used as a compute resource for Databricks SQL?
In Databricks SQL, SQL warehouses (formerly known as endpoints) are the compute resources specifically optimized for running SQL queries, dashboards, and BI workloads. They provide scalability, concurrency, and performance tuning for analytics.
A data analyst has opened up the SQL Editor page and written a new SQL statement. The data analyst now wants to save that statement to easily refer back to it later to add it to a dashboard. The results of the SQL statement must be able to be displayed as a counter, table, or a data visualization.Which approach should the data analyst use to accomplish this task?
In Databricks SQL, saving the statement as a Query allows the analyst to easily retrieve, modify, and add it to a dashboard while also enabling different result visualizations such as counters, tables, and charts. Queries can be reused and shared within Databricks SQL.
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