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  • Book Overview & Buying Learning PostgreSQL
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Learning PostgreSQL

Learning PostgreSQL

By : Salahaldin Juba, Achim Vannahme, Andrey Volkov
4.3 (6)
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Learning PostgreSQL

Learning PostgreSQL

4.3 (6)
By: Salahaldin Juba, Achim Vannahme, Andrey Volkov

Overview of this book

PostgreSQL is one of the most powerful and easy to use database management systems. It supports the most advanced features included in SQL standards. The book starts with the introduction of relational databases with PostegreSQL. It then moves on to covering data definition language (DDL) with emphasis on PostgreSQL and common DDL commands supported by ANSI SQL. You will then learn the data manipulation language (DML), and advanced topics like locking and multi version concurrency control (MVCC). This will give you a very robust background to tune and troubleshoot your application. The book then covers the implementation of data models in the database such as creating tables, setting up integrity constraints, building indexes, defining views and other schema objects. Next, it will give you an overview about the NoSQL capabilities of PostgreSQL along with Hstore, XML, Json and arrays. Finally by the end of the book, you'll learn to use the JDBC driver and manipulate data objects in the Hibernate framework.
Table of Contents (16 chapters)
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15
Index

Getting the database cluster and client tools version


The PostgreSQL version allows the developer to know the supported features and helps them write compatible SQL queries for different versions. For example, the process ID attribute name in the pg_stat_activity view in PostgreSQL versions older than 9.2 is procpid; in PostgreSQL version 9.2, this attribute name is pid.

Getting ready

Getting the database and build version right is important because it allows the developer to know the supported features and compatibility between client tools and the backend version.

How to do it…

The version() function, as shown in the following query, shows the version information as well as build system:

car_portal=# SELECT version ();
                           version
-------------------------------------------------------------
 PostgreSQL 9.4.1, compiled by Visual C++ build 1800, 64-bit
(1  row)

There's more…

It is also important to check the client tools' version, whether it is pg_restore, pg_dumpall or...

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Learning PostgreSQL
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