What is a Transaction? Explain ACID with real SQL Server implications.

Mid MS SQL

Answer

A transaction is a unit of work ensured by ACID properties:

  • Atomicity: All-or-nothing behavior.
  • Consistency: Constraints must remain valid.
  • Isolation: Controls concurrency.
  • Durability: Committed data survives crashes via logging.

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Source: SugharaIQ

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