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By Databricks · Question Mode

QuestionQ45

Executing queries using Databricks SQL and Databricks SQL Warehouses

Under which scenario should a data analyst create and use a user-defined function (UDF)?

  • A When the result of logic needs to be restricted to certain users
  • B When logic needs to be deployed within a subquery
  • C When complex logic cannot be implemented with built-in capabilities
  • D When simple logic needs to be optimized for scaling purposes
Explanation

A UDF is used to implement custom or complex calculations that built-in capabilities cannot provide. BigQuery specifically recommends JavaScript UDFs for complex calculations unsupported by SQL UDFs; UDFs accept input, perform actions, and return a value.

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