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ransaction models depend on transactions, which are ACID-compliant blocks of code. Flip back to Chapter 1 for more detail on the properties of ACID-compliant transactions. This chapter defines common transactions and demonstrates how they work. We’ll focuses on how ACID-compliant transactions work in a Multiversion Concurrency Control (MVCC) system, such as a commercial database. MVCC prevents one user from inadvertently interfering with or harming another user’s work.

The smallest transaction in a database is a single SQL statement that inserts, ...

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