You're reading from Learn PostgreSQL - Second Edition

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Published inOct 2023

PublisherPackt

ISBN-139781837635641

Edition2nd Edition

Concepts

Data Analysis

Authors (2):

Luca Ferrari

Enrico Pirozzi

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What is the difference between a logical and physical backup?
A logical backup, also known as a “dump,” is a backup that interacts directly with the database and its running transactions. A physical backup, also known as a “hot backup,” is a copy of the underlying filesystem and the WALs so that the last known clear state of the database can be restored. See the Introducing types of backups and restores section for more detail.

What is the difference between pg_dump and pg_dumpall?
The pg_dump command is used to dump a single database, while pg_dumpall dumps all the intra-database objects (e.g., the users) and then performs a pg_dump against every database in the cluster. See the Dumping a whole cluster section for more details.

What is the COPY command?
The COPY command is a PostgreSQL-specific statement aimed at bulk-loading or extracting data. It is often used as a way to dump...

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Learn PostgreSQL - Second Edition

Published in: Oct 2023Publisher: PacktISBN-13: 9781837635641

Authors (2)

Luca Ferrari

Luca Ferrari has been passionate about computer science since the Commodore 64 era, and today holds a master's degree (with honors) and a Ph.D. from the University of Modena and Reggio Emilia. He has written several research papers, technical articles, and book chapters. In 2011, he was named an Adjunct Professor by Nipissing University. An avid Unix user, he is a strong advocate of open source, and in his free time, he collaborates with a few projects. He met PostgreSQL back in release 7.3; he was a founder and former president of the Italian PostgreSQL Community (ITPUG). He also talks regularly at technical conferences and events and delivers professional training.
Read more about Luca Ferrari

Enrico Pirozzi

Enrico Pirozzi, EnterpriseDB certified on implementation management and tuning, with a master's in computer science, has been a PostgreSQL DBA since 2003. Based in Italy, he has been providing database advice to clients in industries such as manufacturing and web development for 10 years. He has been training others on PostgreSQL since 2008. Dedicated to open source technology since early in his career, he is a cofounder of the PostgreSQL Italian mailing list, PostgreSQL-it, and of the PostgreSQL Italian community site, PSQL
Read more about Enrico Pirozzi

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