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What is a user-defined function (UDF) in SQL used for?

easy📝 Conceptual Q1 of 15
SQL - Stored Procedures and Functions
What is a user-defined function (UDF) in SQL used for?
ATo create new tables automatically
BTo backup the database
CTo encapsulate reusable logic that returns a value
DTo delete rows from a table
Step-by-Step Solution
Solution:

  1. Step 1: Understand the purpose of UDFs

    User-defined functions are designed to hold reusable code that can return a value based on input parameters.

  2. Step 2: Compare options with UDF purpose

    Creating tables, backing up databases, or deleting rows are not the purpose of UDFs.

  3. Final Answer:

    To encapsulate reusable logic that returns a value -> Option C

  4. Quick Check:

    User-defined function purpose = reusable logic [OK]
Quick Trick: UDFs return values from reusable code blocks [OK]
Common Mistakes:
  • Confusing UDFs with table creation commands
  • Thinking UDFs perform data deletion
  • Assuming UDFs handle backups

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