datediff in postgresql

Originally wanted to find the PostgreSQL database occupy Space Command found this blog, found that the provision of severalcommand is useful (but there are several senses that are sucks.) =), so he translated it over. In addition this article is 09, so the contents may be a little outdated, I collected the original text of useful comments on the last side. Many open source software now uses PostgreSQL as t

Tags: Parent extension nbsp Different operation modes view materialized view commands: Network Disk DownloadContent Profile ...This book will help you understand and use the PostgreSQL open source database system. Not only will you learn about enterprise features in versions 9.2, 9.3, and 9.4, but you'll also find that PostgreSQL is not just a database system, but also an excellent application platform. Thi

Since MySQL was acquired by Oracle, PostgreSQL has become the first choice for open-source relational databases.This article describes the installation and basic usage of PostgreSQL for first-time users to get started. The following is based on the Debian operating system, and the rest of the operating system is not in the balance, but most of the content should apply.First, installationFirst, install the

Label:?? ? ? ? ? ? ? ? Reference: http://book.51cto.com/art/201201/313175.htm System Architecture PostgreSQL database consists of the connection management system (System Controller), the compiled execution system, the storage management system, the transaction system, the system table, and its composition structure and relationship 2-1 are shown. The connection management system accepts the request of the external operation to the system, preprocess

For the based service, I try to use PostgreSQL with PostGIS.You can download PostGIS from here.Http://postgis.net/sourceIt is recommended so need to download and compile yourself since there was many packages dependencies need to be Don E.Here is a tutorial which was very handy if you were using ubuntu12.04/mint13 or its derived ones.=================8x----------------------------------x8============================Http://trac.osgeo.org/postgis/wiki/U

Comparison between mysql and postgresql (for reference) bitsCN.com To understand the difference between PostgreSQL and MySQL, I searched for the keyword MySQL vs PostgreSQL and read several articles on the first page. The following is a summary:Difference between MySQL and PostgreSQL MySQL is the DBMS created by appli

Have you ever accidentally deleted a database table or damaged the disk where the database is stored? If you encounter this situation, I believe you will feel very frustrated, because the results of your hard work for a few weeks may be overwhelmed. Just like anything that contains precious data, PostgreSQL databases should also be backed up frequently. If you store data in a PostgreSQL table, you can back

DescriptionI am using the root user login at the terminal, if the non-root user, that in the command before the need to add "sudo", you understand ...First step: Install PostgreSQL under Ubuntu1. Installing with Apt-get Install[Email protected]:~# apt-get install-y postgresql-9.1 postgresql-client-9.1 postgresql-contri

this post was last edited by osdba on 2011-04-21 16:33 Characteristics Mysql PostgreSQL Instance Launch the instance by executing the MySQL command (MYSQLD). One instance can manage one or more databases. A single server can run multiple mysqld instances. An instance manager can monitor individual instances of mysqld. Launch the instance by executing the Po

Operating System: Debian 3.0 r2 Kernel used: linux-2.4.23 The module used in the experiment: ipvsadm-1.21, PostgreSQL (detailed usage of ipvsadm command please refer to here) Function Description: This is a simple experiment on linuxvirtualserver. It is about how to achieve load balancing between two PostgreSQL databases. This experiment has three purposes: 1. A friend's needs; 2. I haven't looked at LVS fo