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You have a deadlock error in your SQL transactions. Which fix will most likely resolve it?

medium📝 Debug Q14 of 15
SQL - Transactions and Data Integrity
You have a deadlock error in your SQL transactions. Which fix will most likely resolve it?
ARemove all COMMIT statements
BChange transactions to lock tables in the same order
CUse SELECT without WHERE clause to avoid locks
DIncrease transaction isolation level to SERIALIZABLE
Step-by-Step Solution
Solution:

  1. Step 1: Identify cause of deadlock

    Deadlocks often happen due to inconsistent lock order in transactions.

  2. Step 2: Apply fix by ordering locks

    Changing transactions to lock tables in the same order prevents circular waiting and deadlocks.

  3. Final Answer:

    Change transactions to lock tables in the same order -> Option B

  4. Quick Check:

    Consistent lock order fixes deadlocks [OK]
Quick Trick: Fix deadlocks by ordering locks consistently [OK]
Common Mistakes:
  • Removing COMMIT causes longer locks, worsening deadlocks
  • SELECT without WHERE does not prevent locks
  • Higher isolation can increase deadlocks

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