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Databases Illuminated, 4th Edition
book

Databases Illuminated, 4th Edition

by Catherine M. Ricardo, Susan D. Urban, Karen C. Davis
March 2022
Intermediate to advanced content levelIntermediate to advanced
682 pages
22h 58m
English
Jones & Bartlett Learning
Content preview from Databases Illuminated, 4th Edition

11.9 Transaction Management in Oracle

All Oracle transactions obey the ACID properties described in Section 11.1. Oracle uses a combination of locking and multiversion timestamping for concurrency control. Read-only transactions never use locks because Oracle keeps multiple versions of data items for read consistency; however, locks are required for write transactions.

11.9.1 Transaction Limits

A transaction in Oracle consists of one or more DML statements that form a unit of work, or a single data definition language (DDL) statement. Every transaction must have a beginning and an end point. A transaction begins with the first executable SQL statement, or a SET TRANSACTION command, a statement a programmer can use to delimit a transaction and ...

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Publisher Resources

ISBN: 9781284231595