postgresql database replication

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Using JPA + Eclipselink to manipulate the PostgreSQL database

newFirstName) { this.firstName = newFirstName; } public String getLastName() { return this.lastName; } public void setLastName(String newLastName) { this.lastName = newLastName; }}Now you can write the test program:package jpatest;import javax.persistence.EntityManager;import javax.persistence.EntityManagerFactory;import javax.persistence.EntityTransaction;import javax.persistence.Persistence;public class Test {public static void main(String[] args) {

The process structure of PostgreSQL database system

The main functions of the PostgreSQL database system are focused on the Postgres program, whose entry is the main function in the main module, where the data set cluster is initialized and the database server is started. Main module mainly work when determine the current operating system platform, and accordingly do some platform-related environment variable sett

PostgreSQL database deployment and simple use

Tags: http os io using AR for data art on1,DEPLOYBYRUIYINSRPM-IVH http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/ Pgdg-centos94-9.4-1.noarch.rpmpostgresql Yum Repo version yum.postgresql.org/repopackages.php2,repository contains many Different packages including third party addons. The most common and important packages is postgresql-client libraries and client binaries Postgresql-server core

Metasploit Connecting the PostgreSQL database

Metasploit connecting the PostgreSQL database:1. Turn on the PostgreSQL service: Services PostgreSQL start2. Enter PostgreSQL, set the default user password, create a new user, set new user permissions, create a database:Sudo-u postgres psql# access to

Free to install PostgreSQL startup service and CREATE database

Tags: Super User PAC Network code via HTTPS target local resInstallation Environment Windows7 64-bit system Free Install version postgresql-10.3-1-windows-x64-binaries ======================================= Decompression after unable to connect to the database, PGADMIN4 can not start, online to find a variety of methods, finally have a can start, and unable to create a server and

PostgreSQL database cluster: pgpool-II Tool

Pgpool-II (http://pgpool.projects.postgresql.org/) Is an intermediateWork in multiple PostgreSQL serversServicesAnd PostgreSQL dataLibraryCustomerUserTerminal. We can look at pgpool as an intermediary.It provides the following functions: ConnectionConnection Pool:Pgpool-ⅱ StorageConnectionConnect to the PostgreSQL ServerServicesAnd reuse the new

Free trial version of the open source database PostgreSQL 8.0 is released!

Free trial version of the open source database PostgreSQL 8.0 is released! PostgreSQL and MySQL are many pre-installed Linux/Unix databases. By default, only PostgreSQL is installed in RedHat Linux. New features: 1. Support Windows Local compilation (Win32 native server)Previous versions of

Php implementation can be used for mysql, mssql, and PostgreSQL database operations.

This article mainly introduces the php implementation that can be used for mysql, mssql, and pg database operation classes. it encapsulates operations on mysql, mssql, and pg databases in the form of classes, which is of great practical value, for more information about database operations for mysql, mssql, and PostgreSQL databases, you can modify the

Php implementation can be used for mysql, mssql, and PostgreSQL database operations.

This article mainly introduces the php implementation that can be used for mysql, mssql, and pg database operation classes. it encapsulates operations on mysql, mssql, and pg databases in the form of classes, which is of great practical value, for more information about database operations for mysql, mssql, and PostgreSQL databases, you can modify the

Use a PostgreSQL database for geo-location app

The earthdistance () function in postgreSQL is used in the project to calculate the distance between two points on the earth. There is too little Chinese information. I found a good English article, hope to help those who will use earthdistance in the future. It is never easy to make a GEO application. However, with some open-source projects around you, you can easily solve this problem within a few minutes. Postg

SSIS2012 Connecting the PostgreSQL database

Scenario: Company business Database bit PostgreSQL database, need to use ETL tool (SSIS2012) to extract data into Data Warehouse 1. SSIS2012 Connect PostgreSQL database Two ways:. NET Provider for OLE DB and ODBC, the first colleague is to spend money to buy from the foreign

Introduction to the lateral type _ database in PostgreSQL other

: Viewed_homepage | Use_demo | Entered_credit_card -----------------+----------+--------------------- 827 | 220 | 86 From the View home page to a week to use the demo, and then to a week to enter credit card information, which gives us a three-step channel conversion. From then on, the powerful PostgreSQL allows us to drill down into these data sets and analyze the performance of our web site as a whole. Then we may have the following

"Database" PostgreSQL and SQL Primary use (tpc-h data application)

tutorial, without encountering any problems. 2. In fact, this homework is very simple, but at the beginning I very blindly began to do homework, have not made clear the principle, encountered what attributes to convert what file and import into the database. Then the data were all erased, first understand tpc-h sql statements, with particular emphasis on the order in which statements are executed, because the groupby , having where 3. The q

Python uses Pygresql to manipulate PostgreSQL database tutorials _python

PostgreSQL is a powerful open source relational database, this article uses Python to achieve the open source database PostgreSQL Common operations, the development process is as follows: I. Environmental information: 1. Operating system: RedHat Enterprise Linux 4Windows XP SP2 2.

Python Operations PostgreSQL Database

Tags: pass password post One turn operation Col except exec1 ImportPSYCOPG2 as Pg22 3 #back to database PostgreSQL connections4 defget_db_conn ():5 #Create a connection6 returnPg2.connect (database='Test', user='Admin', password='Admin', host='127.0.0.1', port='10001')8 9 Ten #Operations Database

PostgreSQL database user password encryption method

PostgreSQL database user password encryption method: several tables related to user passwords in postgresql: selectusername, passwdfrompg_shadow; selectrolname, rolpasswordfrompg_authid; selectusename, passwdfrompg_user; selectrolname, role PostgreSQL database user password

Metasploit four built-in PostgreSQL database

Recently work is very uncomfortable, also looking at Python, so did not insist on writing notes, today to update a little note, Metasploit support database has 2 kinds, one is PostgreSQL, there is a familiar with MySQL, in fact, I am not familiar with MySQL, I have only used orcal Mmsql and accsess database, as for PostgreSQL

PostgreSQL Backup Recovery database and bulk Import Export data to file method

To back up the database:pg_dump-h localhost-u root demo02 >/home/arno/dumps/demo02.bakTo recover a database:psql-h localhost-u root-d Demo Backup table:pg_dump-h localhost-u root demo02-t books >/home/arno/dumps/books.bakRecovery table:psql-h localhost-u root-d demo-t Books Psql Copy to/from usage:1. Need to log in to the database using Postgres Super User psql-u postgres-d demo022. Saved/Read folders need to give Postgres user permission to read and

Python: PostgreSQL database operations (using DB api2.0)

Yesterday, I used the pygresql module in the article "Python: Operating PostgreSQL databases (using pygresql)" to perform operations on PostgreSQL databases, today, we use another common Python database access interface dB api2.0 to perform the same operation. In fact, we use dB api2.0 in the article "Python: Operating embedded

POSTGRESQL cannot create a database. The following error occurs: createdb: cocould not connect.

Run the following command to create a database named mydb The code is as follows:Copy code Createdb mydb The following error is returned: psql: FATAL: role "terry" does not exist. terry is the name of my machine and there is no role named terry in the postgresql database. Therefore, this error is reported, you only need to add the-U parameter to sp

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