COF-C03 Practice Question: Performance Optimization, Querying, and Transformation
Which function or command should be used to analyze the execution details of a slow-running query in Snowflake?
⚠ Common exam trap
Candidates often suggest checking the 'Query History' tab alone. While it shows status, it does not provide the visual execution plan or stage-by-stage metrics found in the Query Profile.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Query Profile.
The Query Profile is the primary tool for visualizing the execution plan and performance metrics of a query. It provides a breakdown of each stage, including the time spent on data scanning, joins, and aggregations. Accessing this through the Snowflake UI or the `GET_QUERY_OPERATOR_STATS` function is essential for identifying bottlenecks and understanding how the optimizer handled the query, which is a prerequisite for effective performance tuning and optimization efforts.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DESCRIBE TABLE.
Why it's wrong here
The DESCRIBE TABLE command returns the structure and schema of a table, including column names and data types. It does not provide any information regarding query execution, performance bottlenecks, or how specific queries are being processed, making it useless for diagnosing why a particular query is running slowly.
- ✗
SHOW WAREHOUSES.
Why it's wrong here
The SHOW WAREHOUSES command provides information about the configuration and status of virtual warehouses. It does not provide insight into query-level performance or execution plans, so it cannot be used to analyze the specific bottlenecks of a single slow-running query within the Snowflake compute environment.
- ✓
Query Profile.
Why this is correct
The Query Profile is the dedicated interface in the Snowflake console for analyzing the performance of a query. It provides a detailed breakdown of the execution steps, allowing users to identify where time is being spent, such as in data scanning, joins, or remote disk spilling during query execution.
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SYSTEM$ABORT_QUERY.
Why it's wrong here
This system function is used to terminate a running query that is taking too long or consuming too many resources. It is an administrative action to stop execution and does not provide any analysis or diagnostic information regarding the performance bottlenecks that caused the query to run slowly initially.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Snowflake exam blueprint
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