January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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Questions
- Define the term transaction. What is the meaning of implicit transaction?
- What are the functions of the following SQL commands: BEGIN, END, COMMIT, ROLLBACK, and SAVEPOINT?
- Assuming you are working with an environment that does not support transactions, give a solution to mitigate the following scenario: A developer performed a bulk upload on a non-empty table, and during the upload, the power shut down. The developer would like to restore the initial state.
- What is the difference between concurrency and parallelism? Does PostgreSQL support both?
- What is MVCC? What negative impact does it have on the database design? How does PostgreSQL mitigate this impact?
- List the transaction isolation levels. What is the default transaction ...
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