postgresql database encryption

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

Project used in the PostgreSQL earthdistance () function to calculate the distance between two points on the Earth, the Chinese information is too little, I found an English, speak a very good article, I hereby translate, hope to be able to help later use to earthdistance classmate. It's never easy to do a geo application. But with some open source projects around you can easily solve the problem in a matter of minutes.

Label:The default database for hive is Derby, and this database is for self-debugging, but it's a bit of a challenge to face a lot of data, so next I'm going to swap derby for PostgreSQL, and I'll talk about what to look for in the replacement process. First, download hive, we download the stable apache-hive-0.14.0-bin.tar.gz directly, http://apache.fayea.com/hiv

BackgroundBecause of the needs of the project, the database PostgreSQL is used, so the database is installed on Windows PostgreSQL . However, after installation, the local database cannot be accessed, this time to view the /data directory, without any files. And during the i

Author: He WeipingSource:Http://www.pgsqldb.org/mwiki/index.php/Pgbouncer%E6%90%AD%E5%BB%BA%E6%95%B0%E6%8D% AE %E5%BA%93%E8%BF%9E%E6%8E%A5%E6%B1%A0 Recently, we have used PostgreSQL for backend databases in some projects. Due to the need to control the client connection usage type and connections, pgbouncer is used for implementation. Pgbouncer-related basic documentsPgsqldb Chinese siteI have already provided many documents, so I will not describe

Windows2003, reported warning, and no PostgreSQL service Problem running Post-Install step. Installation correctlyThe database cluster initialisation failed Http://forums.enterprisedb.com/posts/list/3984.pageAndy, this man is PostgreSQL 9.3.5.http://my.oschina.net/congqian/blog/135590This person is the postgresql-wind

According to the development of Java Mall, the development of JSP Mall and the developer of Java Mall products, PostgreSQL needs to do its own buffering technology in development, because there are many cases where I/O buffering is used for various reasons. This causes a problem: the data in the database is often stored two times in memory, once in the PostgreSQL

Tags: datagridview http using OS file data io forRecently began to do the work of C # dotnet, because of the interest in PostgreSQL database, so I studied how to access the database of PostgreSQL problem. 1. In order to access the PostgreSQL

Tags: SQL Postgre databaseBackup of PostgreSQL DatabaseFirst, establish a database connectionCommand: PSQL-H IP address-P Port-U database user name-D database namePsql-h 127.0.0.1-p 5432-u postgres-d postgresPsql Command connection optionsConnection options:-H,--host=hostname host default Local-P,--port=port port defau

Backgroundin my job. An automated system is required on a project using the PostgreSQL database to perform backups on a daily basis. After some research, it is decided to create a Windows batch file and add it to the Windows Planning task.The following are the specific steps: How to configureFirst step:Download the batch file. Step Two:You can run the Task Scheduler management tool with a simple command (

After the PostgreSQL software version upgrade, you need to use Pg_upgrade to migrate the old version of the database, the specific operating parameters can refer to the official documentation, here to record the operation of the details of the problem occurred: The new version of the software in the INITDB to ensure that the locale and the old version of the software consistent, if the old version of

Label:When we use the PostgreSQL database, if a table is not constrained, it is likely that there will be several identical pieces of data, that is, duplicate data. As shown in the following:So what if we were to delete 2 of them? The first is that we can clear the contents of the table, and then insert the content into the table using the insert into statement. This approach works, but it is not recommende

A new feature of PostgreSQL 9.2 is the range type range types, by which you can easily guess the purpose of the type, which allows you to define a range of values for a column of data. This simple feature lets us not define two fields to describe the starting and ending values of the values, and one of the most intuitive examples is: postgres# CREATE TABLE salary_grid (id int, position_name text, start_salary int, end_salary int); CREATE TABL

Original Entity freamwork 6 connect PostgreSQL databaseDevelopment environmentVS. Update 1 postgre Sql 9.4Use procedure1. Use NuGet to add references to Entityframework6.npgsql in your project2. Download and install the Npgsqlddexprovider program,: https://github.com/npgsql/npgsql/releases , please download EXE file, he will help you do a lot of things. After the download is complete, close vs, install the downloaded files, after the installation is c

Label: get table primary key name in PostgreSQL database First, to obtain the primary key information for the teacher table, as follows: SelectPg_constraint.conname asPk_name,pg_attribute.attname asColname,pg_type.typname asTypeName fromPg_constraintInner JoinPg_class onPg_constraint.conrelid=pg_class.oidInner JoinPg_attribute onPg_attribute.attrelid=pg_class.oid andPg_attribute.attnum=Pg_constraint.conkey

PostgreSQL is an object-relational database management system (ORDBMS) based on POSTGRES, Version 4.2, developed by the University of California, Berkeley computer department. Many of the concepts pioneered by Postgres appear in the commercial database for a long time. PostgreSQL is an open source successor to the orig

In the general database configuration file, the connection database is like this, and now the project needs to encrypt the password processing, So we're going to rewrite the Org.apache.commons.dbcp.BasicDataSource class as follows: Package com.joyintech.tisaccel.base;Import Org.apache.commons.dbcp.BasicDataSource;public class Teradataconnection extends Basicdatasource {Public Teradataconnection () {TODO aut

This article mainly introduces how to connect to and operate a PostgreSQL database in php, and analyzes in detail how to connect php to a PostgreSQL database in the form of an instance, as well as reading, adding, modifying, and deleting skills, has certain This article mainly introduces how to connect to and operate a

The Navicat for PostgreSQL database uses users and groups to manage database access permissions, and users have database objects, such as databases, on which you can specify permissions to other users, and control the scope and permissions of other users to access objects. This Navicat tutorial is to parse the NAVICAT

Tags: des style color using OS io strong fileAll messages sent by the PostgreSQL server are given a five-character error code that follows the custom of the SQL "SQLSTATE" code. Apps that need to know what error conditions are occurring should usually test the error code instead of the text error message.These error codes are not easily modified with the version of PostgreSQL, and generally do not change as