PostgreSQL: Documentation: 16: Chapter 53. System Catalogs
WEBPostgreSQL 's system catalogs are regular tables. You can drop and recreate the tables, add columns, insert and update values, and severely mess up your system that way. Normally, one should not change the system catalogs by hand, there are normally SQL commands to do that.
What is a System Catalog? - Definition from Techopedia
WEBSep 17, 2014 · A system catalog is a group of tables and views that incorporate vital details regarding a database. Every database comprised of a system catalog and the information in the system catalog specifies the framework of the database.
System catalog views (Transact-SQL) - SQL Server | Microsoft Learn
WEBOct 3, 2023 · Catalog views return information that is used by the SQL Server Database Engine. We recommend that you use catalog views because they are the most general interface to the catalog metadata, and provide the most efficient way to obtain, transform, and present customized forms of this information.
System catalog tables - IBM
WEBThe system catalog consists of tables and views that describe the structure of the database. Sometimes called the data dictionary, these table objects contain everything that the database knows about itself. Each system catalog table contains information about specific elements in the database.
Querying the SQL Server System Catalog FAQ - SQL Server
WEBThis topic contains a list of frequently asked questions. The answers to these questions are queries that are based on catalog views.
PostgreSQL: Documentation: 16: 53.1. Overview
WEBTable 53.1 lists the system catalogs. More detailed documentation of each catalog follows below. Most system catalogs are copied from the template database during database creation and are thereafter database-specific. A few catalogs are physically shared across all databases in a cluster; these are noted in the descriptions of the individual ...
Understanding And Reading the PostgreSQL System Catalog
WEBAug 2, 2018 · Here we will go over an overview of the system catalog, and highlight how to read it, and how to pull useful information from it. Some of the metadata is straightforward, and other pieces take a bit of digesting to generate real useful information.
The System Catalog - SpringerLink
WEBDec 18, 2014 · The system catalog (data dictionary) is perhaps the most important database object in a database system. This is so because it facilitates and supports all or most of the other database objects. The system …
What Is the System Catalog? | Sams Teach Yourself SQL in 24
WEBThe system catalog is a collection of tables and views that contain important information about a database. A system catalog is available for each database. Information in the system catalog defines the structure of the database.
Introduction to the System Catalog - SQL Server
WEBThe system catalog consists of tables describing the structure of objects such as databases, base tables, views, and indices. (These tables are called system base tables.) The Database Engine frequently accesses the system catalog for information that is essential for the system to function properly.