postgresql adminpack

PostgreSQL Advantage2016-10-20 21:36 686 People read comments (0) favorite reports Classification:MySQL Database (5)PostgreSQL is a free object-relational database server (database management system), which is very powerful. Includes support for the world's richest data types, such as IP types and geometry types, among others.Many readers have asked the question: If you plan to choose a free, open-source

(1) User PracticalityProgram: Createdb creates a new PostgreSQL database (same as SQL statement: Create Database) Createuser creates a new PostgreSQL user (same as SQL statement: create user) Dropdb deletes a database Dropuser: delete a user Pg_dump exports the PostgreSQL database to a script file Pg_dumpall: export all

In the previous chapters, we have understood the various replication concepts. This is not just a theoretical overview of the things that will enhance your consciousness for the next thing to be introduced, but will also introduce you to a broad topic.In this chapter, we will be closer to the actual solution and understand how PostgreSQL works internally and what replication means. We'll see what the so-called transaction log (XLOG) does, and how it w

PostgreSQL database server listener settings and Client Connection Methods tutorial, postgresql Server As we all know, PostgreSQL is a free object-relational database server (Database Management System). It is an open-source database system that can be used for free. This article describes in detail the listener settings and Client Connection Methods of the

In the case of manual installation (for the case where the source code is compiled for PG or the decompressed version is installed for PG), PG does not start automatically when it is started, and stops automatically when it is turned off, as a DBA, this is obviously unacceptable. 1. Self-starting services in Windows In Windows, you can use the pg_ctl command to generate the postgresql service and enable it to start itself. In fact, the installation v

PostgreSQL installation and configuration tutorial on Windows and postgresql installation tutorial PostgreSQL extension PostGIS is the most famous open source GIS database.Installing PostgreSQL is the first step. 1. Download the binary Installation File of PostgreSQL.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------The pg_logdir_ls (), pg_ls_dir (), pg_file_rename (), pg_file_write (), pg_file_read (), and pg_file_length () functions in the adminpack are all limited .. /postgresql/data Directory (the reason why the directory does not have permissions was

In-depth interpretation of sequences in PostgreSQL and their related functions, and interpretation of postgresql I. Introduction A sequence object (also called a SEQUENCE generator) is a special single-row table created using create sequence. A sequence object is usually used to generate a unique identifier for a row or table. Ii. Create a sequence Method 1: Specify the field type as serial directly in the

PostgreSQL tutorial (5): Functions and operators (1), postgresql Operators I. logical operators: Common logical operators include AND, OR, and not. Its semantics is exactly the same as that of logical operators in other programming languages. Ii. Comparison operators: The following is a list of comparison operators provided by PostgreSQL: The comparison operator

: There are various types of xlog records (for example, Heap,btree,clog,storage,gin, and Standby records, just to name a few).Xlog Records Backward links. This way, each entry points to the previous entry in the file. In this way, we can fully believe that we have found the end of the record as long as we want to point to the pointer to the previous entry.make XLOG with certaintyAs you can see, a change could trigger many xlog entries. This is true for all kinds of statements, such as a large DE

PostgreSQL tutorial (13): database management details, postgresql details I. Overview: A database can be considered as a name set of an SQL object (database object). Generally, each database object (table, function, etc.) belongs to only one database. However, for some system tables, such as pg_database, it belongs to the entire cluster. More accurately, a database is a set of patterns, and a schema contain

to re-compile and run it. Online debugging cannot be performed during running, but logs can only be played. In view of the above problems, we finally gave up. However, if you use gdb for debugging in linux, you cannot hold it. So use eclipse. Reference: http://wiki.postgresql.org/wiki/Working_with_Eclipse [1] My system environment: Centos6.4 _ x64 Gcc.4.4.7 Eclipse-c/c ++ kepler Postgresql 9.3 The following is my configuration process:1. install ne

PostgreSQL tutorial (18): client commands (2), postgresql tutorial VII. pg_dump: Pg_dump is a tool used to back up PostgreSQL databases. It can even perform a full and consistent backup when the database is being used concurrently without blocking access to the database by other users. The dump format generated by this tool can be divided into two types: script a

Tutorial on installing and using the extension module on PostgreSQL, postgresql extension module Installation Module Note: My runtime environments are Ubuntu 10.04 and PostgreSQL 8.4. First, install the postgresql-contrib package and restart the database server. Then, check the contrib directory to see if there are som

Manual PostgreSQL database initialization tutorial in windows, initialize postgresql Environment: win7 64 sp1PG: 9.3.5 1. Create the postgres user, and the password is also postgres: net user postgres postgres /add 2. Create a data directory under the root directory of the database: C:\Program Files\PostgreSQL\9.3>md data 3. Remove the administrator permission on

PostgreSQL tutorial (1): Detailed description of data tables and detailed description of postgresql I. Table definition: For any relational database, tables are the core and basic object units of data storage. Now let's start from here.1. Create a table:Copy codeThe Code is as follows:Create table products (Product_no integer,Name text,Price numeric);2. delete a table:Copy codeThe Code is as follows:Drop ta

PostgreSQL tutorial (14): database maintenance, postgresql tutorial I. Disk Space Restoration: In PostgreSQL, the data rows deleted or updated using the delete and update statements are not actually deleted, the physical address of the old data row sets the row status to deleted or expired. Therefore, when data in a data table changes frequently, the space occupi