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What is the main purpose of using a QueryBuilder in NestJS with TypeORM?

easy📝 Conceptual Q11 of 15
NestJS - Database with TypeORM
What is the main purpose of using a QueryBuilder in NestJS with TypeORM?
ATo build database queries safely and readably without raw SQL
BTo write raw SQL queries directly in the code
CTo create frontend UI components
DTo manage user authentication
Step-by-Step Solution
Solution:

  1. Step 1: Understand QueryBuilder role

    QueryBuilder helps create database queries in a safe and readable way, avoiding raw SQL.

  2. Step 2: Identify incorrect options

    Options B, C, and D do not describe QueryBuilder's purpose correctly.

  3. Final Answer:

    To build database queries safely and readably without raw SQL -> Option A

  4. Quick Check:

    QueryBuilder purpose = safe, readable queries [OK]
Quick Trick: QueryBuilder avoids raw SQL for safer queries [OK]
Common Mistakes:
  • Confusing QueryBuilder with raw SQL usage
  • Thinking QueryBuilder manages UI or auth
  • Assuming QueryBuilder is for frontend

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