Bird
0
0

Which SQL statement is best to prevent deadlocks by controlling transaction order?

easy📝 Syntax Q12 of 15
SQL - Transactions and Data Integrity
Which SQL statement is best to prevent deadlocks by controlling transaction order?
ARun transactions without COMMIT statements
BUse SELECT * without WHERE clause
CAlways access tables in the same order in all transactions
DUse DROP TABLE before INSERT
Step-by-Step Solution
Solution:

  1. Step 1: Understand deadlock prevention strategy

    Accessing resources in a consistent order prevents circular waiting among transactions.

  2. Step 2: Evaluate options

    Only accessing tables in the same order avoids deadlocks; other options cause errors or do not help.

  3. Final Answer:

    Always access tables in the same order in all transactions -> Option C

  4. Quick Check:

    Consistent access order = Deadlock prevention [OK]
Quick Trick: Access tables in same order to avoid deadlocks [OK]
Common Mistakes:
  • Ignoring transaction commit timing
  • Using SELECT * without filters causes performance issues, not deadlocks
  • Dropping tables is unrelated to deadlock prevention

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More SQL Quizzes
Advanced Query Patterns - Why query patterns matter - Quiz 1easy CASE Expressions - CASE in ORDER BY - Quiz 4medium Common Table Expressions (CTEs) - Why CTEs are needed - Quiz 4medium Database Design and Normalization - Third Normal Form (3NF) - Quiz 1easy SQL Security Basics - Why prepared statements exist - Quiz 5medium SQL Security Basics - Why SQL security awareness matters - Quiz 13medium Stored Procedures and Functions - Function vs procedure decision - Quiz 1easy Window Functions Fundamentals - ROW_NUMBER function - Quiz 2easy Window Functions Fundamentals - NTILE for distribution - Quiz 1easy Window Functions Fundamentals - Window frame specification (ROWS BETWEEN) - Quiz 1easy