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| Section | Objectives |
|---|---|
| Data Modeling and Performance Optimization | - Modeling approaches in Snowflake
|
| Data Loading and Unloading | - Data export
|
| Snowflake Architecture and Data Platform Fundamentals | - Data platform fundamentals
|
| Data Transformation and Analysis | - Analytical workloads
|
| Security, Governance, and Data Sharing | - Data sharing and governance
|
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NEW QUESTION # 34
A Data Analyst created a cost overview dashboard in Snowsight. Management has asked for a system date filter to easily change the time period and refresh the data in all dashboard tiles with a single filter selection.
The system date filter is shown below:
The Analyst wants to apply the filter onto individual dashboard components.
Adding which where clause to the queries will apply the filter as required?
Answer: B
Explanation:
In Snowsight, the modern web interface for Snowflake, System Filters are specialized keywords that provide out-of-the-box interactivity for dashboards and worksheets. These filters allow non-technical users to manipulate the timeframes of visualizations (e.g., switching from "Last 7 days" to "Last 12 months") without requiring an analyst to manually rewrite the underlying SQL code.
The most critical keyword for temporal filtering is :daterange. When a dashboard contains a date filter widget (as shown in the provided exhibit), the :daterange keyword acts as a dynamic placeholder for the range selected by the user. Unlike a standard variable that might represent a single date, :daterange is specifically designed to handle the start and end boundaries of a period. When injected into a WHERE clause, Snowflake automatically expands this keyword into the appropriate logic to filter records between those two points in time.
Evaluating the Options:
* Options A and B are incorrect because they use hard-coded logic (-7 days). While these would return data for the last week, they are static. Changing the filter in the dashboard UI would have no effect on these queries, failing the requirement to "easily change the time period" via the filter selection.
* Option C is incorrect because :date_filter is not a reserved system keyword in Snowsight. While an analyst could create a custom filter with that name, it would not automatically link to the standard system date widget shown in the image.
* Option D is the 100% correct answer. Using WHERE <column> = :daterange is the documented standard for linking a query to the Snowsight system date filter. This ensures that every tile in the dashboard remains synchronized with the user's global date selection, providing a cohesive and interactive reporting experience.
NEW QUESTION # 35
A data analyst is tasked with creating a view in Snowflake that aggregates sales data by region. The underlying sales table is updated frequently. The analyst wants to optimize query performance and minimize the impact of these updates. Which of the following approaches would be the MOST suitable for creating the view?
Answer: B
Explanation:
A materialized view (Option B) is the most suitable because it pre-computes and stores the aggregated data. This improves query performance, especially for frequently accessed aggregated data. Since it's automatically refreshed when the underlying sales table is updated, it minimizes the impact of updates on query performance. Standard views are computed on the fly, negating performance benefits. Temporary tables require manual updates. Secure views focus on data security, not performance. Recursive views are for hierarchical data, not aggregation.
NEW QUESTION # 36
A data analyst is tasked with optimizing a query that aggregates data from a table 'ORDERS' containing order details, including columns like 'ORDER ID', 'CUSTOMER ID, 'ORDER DATE, 'PRODUCT ID', and 'QUANTITY. The query calculates the total quantity of products ordered per customer and month. The current query is as follows: SELECT CUSTOMER ID, DATE TRUNC('MONTH', ORDER DATE) AS ORDER MONTH, SUM(QUANTITY) AS TOTAL QUANTITY FROM ORDERS GROUP BY CUSTOMER_ID, ORDER_MONTH ORDER BY CljSTOMER_lD, ORDER_MONTH; Deopite the 'ORDERS' table being relatively small (10 million rows), the query performance is slow. The analyst suspects a poorly chosen warehouse size. Which of the following actions, combined with monitoring query execution, would be MOST beneficial to determine the optimal warehouse size and improve query performance?
Answer: D
Explanation:
The most beneficial approach is to start with the smallest warehouse size and incrementally increase it (B). This allows for observing the impact of warehouse size on query performance and cloud services usage. Increasing until the query time plateaus or cloud services usage increases significantly indicates the point of diminishing returns. Simply using the largest size (A) may be wasteful, and ignoring cloud services usage (C) can lead to cost overruns. Query history (D) may not be relevant if the query is significantly different. Setting a timeout (E) will not optimize the warehouse size.
NEW QUESTION # 37
You are building a dashboard to monitor the performance of a Snowflake data pipeline. This pipeline ingests data from various sources, transforms it, and loads it into target tables. You want to visualize the overall pipeline latency, including the time spent in each stage (ingestion, transformation, loading). You have access to event logs that capture the start and end timestamps for each stage of each pipeline run. The logs are stored in a Snowflake table named 'PIPELINE LOGS' with columns: 'PIPELINE RUN (VARCHAR), 'STAGE_NAME' (VARCHAR), 'START_TIMESTAMP' (TIMESTAMP_NU), 'END_TIMESTAMP (TIMESTAMP_NTZ). Which visualization type and query construct provides the MOST effective way to visualize the latency of each stage within each pipeline run, allowing for easy identification of bottlenecks?
Answer: C
Explanation:
A Gantt chart (C) is the most effective visualization for this scenario. It directly shows the start and end times of each stage within each pipeline run, making it easy to visually identify bottlenecks and understand the overall timeline. The query would need to calculate the duration of each stage using 'TIMESTAMPDIFF()' to determine the length of each bar in the Gantt chart. The other options provide aggregated summaries (A, D) or distributions (B) that don't directly show the temporal relationship between stages within each pipeline run. Heatmap is not so useful here.
NEW QUESTION # 38
You are tasked with creating a data model for a global e-commerce company in Snowflake. They have data on customers, products, orders, and website events. They need to support complex analytical queries such as 'What are the top 10 products purchased by customers in the US who have visited the website more than 5 times in the last month?' The data volumes are very large, and query performance is critical. Which of the following data modeling techniques and Snowflake features, used in combination, would be MOST effective?
Answer: B,E
Explanation:
Options B and E are the most effective. A star schema (B and E) is well-suited for analytical workloads. Clustering the fact table on customer and product IDs (B) helps improve query performance when filtering on those dimensions. Materialized views (E) provide pre-aggregated data for common queries, further boosting performance. Normalization (A) can lead to too many joins. Data Vault (C) is complex and may not be necessary. A wide, denormalized table (D) can be difficult to manage and maintain, and zero-copy cloning is for backup, not performance. Clustering on dimension keys in the fact table works best when coupled with a star schema and the keys are frequently used as a filter.
NEW QUESTION # 39
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