PostgreSQL

Background1 million database connections, absolutely crazy, how ordinary people do this kind of thing. Yes, what does it mean for a database to support 1 million connections? Can't I use a connection pool? In addition to holding a game of mind,

PostgreSQL 9.3 uses a new type of union! The launch of lateral is low-key, but it implements the powerful new queries that need to be written before the program can be used. In this article, I will introduce a channel conversion analysis that is

In a (bad) PostgreSQL query, just a little to change (any (array[...)) to any (VALUES (...)) will be able to reduce the query time from 20s to 0.2s. From the simplest learning to use EXPLAIN analyze, to learn to use the Postgres community a lot of

The MDB format file can export each of the tables contained in the Mdbtools tool to a CSV format file. Because of the PostgreSQL of the Access database and the format of the database, use Python's file processing to modify the resulting CSV file to

"Guide" This article is divided into two parts, the first part of my motives for this conversion, and step-by-step explanation of how the existing MySQL data into the postgres. The second part will explain how to adjust PHP to the new database

"" Http://www.enterprisedb.com/products-services-training/pgdownload#windows"Kee" Port number 5432"Configuration Path" postgresql\9.5\data\postgresql.conf"Optional Learning Environment Configuration" uses "listen_addresses" as the keyword to query

Q: How do I page && conditionally && by order && name do not duplicate data?A: In fact, is the row to the column, then, PostgreSQL how to go to the column, Baidu, there are about three kinds of wordingNotation 1 GROUP by + sum + case

PostgreSQL has a built-in UUID type, but the default installation does not have a correlation function and needs to be generated manually.One, if it is a separate package installation method as shown belowPackage to my previous blog mentioned in the

After the project was ported from Oracle to PostgreSQL (version 9.4), the days went down again, tracked and positioned to determine that the call to the Pgdatabasemetadata.getprimarykeys () interface returned an empty set.It is well known that in

To view the time zones and times for a database:Postgres=Select now (); Now ------------------------------- - in :04.04916+(1 Records)To view time zones:Postgres=# Show time zone; TimeZone ---------------

Wal-Log IntroductionThe Wal full name is the write ahead log, which is the online redo log in PostgreSQL, to ensure data consistency and transactional integrity in the database. And the technology introduced in PostgreSQL 7. Its central idea is

First, IntroductionPostgreSQL is a very complex object-relational database management system (ORDBMS), and is currently the most powerful, feature richest and most complex free software database system. Some features don't even have a commercial

First, download unzip1, download postgresql-9.4.0-1-windows-x64-binaries.zip2, unzip postgresql-9.4.0-1-windows-x64-binaries.zip to E: \Second, add users1, add windows Span style= "font-family: Arial" > user, used to start postgresql windows

Because it is a development phase, there are no parameters configured for Postgres, all using the default configuration at the time of installation,It's not unusual to run in the past, but my CPU resource usage has suddenly risen in the last few

We know that the information in the PostgreSQL database is ultimately written to the persistent device. So how does PostgreSQL store the information organization on disk? Bruce Momjian has a slide "insider PostgreSQL Shared Memory", inside the

  How to delete Windows Service Author: Network Security Log (www.nslog.cn) Date: 2006/10/10 (reprinted please keep this statement) I. What is Windows Service, also known as Windows service, it is the basis of Windows operating system and Windows

1. Start and close server processes: The following are the usage and common options of the pg_ctl command. It should be noted that this command is the encapsulation body of the S command, so it is more convenient to use than using Postgres directly.

Recently, we have to do some examples about PostgreSQL multi-instance running. Generally, we need to install the PostgreSQL server on different machines and then configure it on different machines, for example, use plproxy to set some demos. Of

Install PostgreSQL in Linux 1. Add a user to create a directoryUseradd Postgres-D/usr/local/pgsqlPasswd ipvsMkdir/usr/local/pgsql/Mkdir/usr/local/pgsql/DataChown-r Postgres/usr/local/pgsqlChown Postgres/usr/local/pgsql/Data 2. Set Environment

Step 1: Install Postgresql in Ubuntu Sudo apt-get install postgresql-8.4 postgresql-client-8.4 postgresql-contrib-8.4Run the preceding command to install psql on the server and command line client. /Usr/lib/postgresql/8.4/Stores postgresql-related