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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

SQL fundamentals

SQL is used to manipulate the data in the database and to query the database. Also, SQL is used to define the structure of the data. You already know that from the previous chapters. In general, SQL consists of three parts:

  • Data Definition Language (DDL)
  • Data Manipulation Language (DML)
  • Data Control Language (DCL)

The first part is used to create and manage the structure of the data, the second part is used to manage the data itself, and the third part—to control access to the data. Usually, the data structure is defined only once and then it is rarely changed. But the data is constantly inserted into the database, changed or retrieved. For that reason, DML is used much more often than DDL.

SQL is not an imperative programming language, which makes it different from many other languages. To be more specific, one cannot define a detailed algorithm of how the data should be processed, and this might make an impression of lack of control of the data. In imperative languages...

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Learning PostgreSQL
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