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What is the main purpose of a user-defined function in SQL?

easy📝 Conceptual Q11 of 15
SQL - Stored Procedures and Functions
What is the main purpose of a user-defined function in SQL?
ATo create reusable code that returns a single value
BTo store large amounts of data
CTo create tables automatically
DTo delete records from a table
Step-by-Step Solution
Solution:

  1. Step 1: Understand what user-defined functions do

    User-defined functions are designed to perform specific tasks and return a single value.

  2. Step 2: Compare options with the function's purpose

    Only To create reusable code that returns a single value describes creating reusable code that returns a single value, which matches the function's role.

  3. Final Answer:

    To create reusable code that returns a single value -> Option A

  4. Quick Check:

    User-defined function = reusable single-value code [OK]
Quick Trick: Functions return one value and reuse code easily [OK]
Common Mistakes:
  • Confusing functions with tables or data storage
  • Thinking functions delete or modify data directly
  • Assuming functions return multiple rows or tables

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