dbt - Packages and Reusability
In dbt-utils, what is the primary output of the
surrogate_key macro when applied to a list of columns?In dbt-utils, what is the primary output of the surrogate_key macro when applied to a list of columns?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand surrogate_key purpose
The surrogate_key macro creates a unique identifier for a combination of columns.Step 2: How it generates the key
It uses a hashing function to generate a fixed-length string that uniquely represents the input columns.Final Answer:
A hashed string that uniquely identifies the combination of the specified columns -> Option BQuick Check:
Hashing ensures uniqueness and fixed length [OK]
Quick Trick: surrogate_key creates a hash, not concatenation [OK]
Common Mistakes:
MISTAKES- Assuming it concatenates columns directly
- Thinking it generates numeric sequences
- Believing it outputs JSON objects
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