postgres list databases

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Analysis of concurrency control in Postgres and transaction characteristics (Concurrency)

PostgreSQL provides developers with a rich set of tools to manage concurrent access to data. Internally, data consistency is maintained by using a multi-version model (multi-version concurrency control, MVCC). This means that each SQL statement sees

Rails Connection PostgreSQL Error: Psql: Fatal error: User "Postgres" Ident authentication failed

Psql: Fatal error: User "Postgres" Ident authentication failed1 after installing the PostgreSQL database, you need to initialize and some configuration rails project to connect PostgreSQL.After the PostgreSQL data is installed (the Yum command is

Modify one line of code to promote Postgres performance 100 times times _postgresql

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

CentOS Nginx+python+fastcgi+postgres Deployment Summary (Django Edition)

Recently, because of the needs of the project to start a large number of nginx, so also want to take the opportunity to use the previous Django+apache architecture to replace the Django+nginx. The common Django WebApp deployment approach is FCGI

Summary of Postgres operations in Ubuntu

Summary of Postgres operations in Ubuntu 1.Basic operation commands After the installation is complete, PostgreSQL creates a database user account named Postgres by default. It is a super Administrator account like the root account of MySQL

PostgreSQL Docker-based multi-instance installation

Reference: https://hub.docker.com/_/postgres/https://docs.docker.com/engine/installation/debian/Using Docker for multi-instance installation is simpler, more convenient, and better isolated than the source code.Installing Docker Update the

Rails connection postgresql error: psql: Fatal error: user & quot; postgres & quot; Ident authentication failed, psqlpostgres

Rails connection postgresql error: psql: Fatal error: User "s" Ident authentication failed, psqlpostgresPsql: Fatal error: User "s" Ident authentication failed 1. After the postgresql database is installed, you must initialize and configure some

Linux install PostgreSQL and start and close tutorials

Operating system version[Root@web103 ~]# More/etc/issueCentOS release 5.9 (Final)Kernel \ r \m[Root@web103 ~]# Uname-aLinux web103 2.6.18-348.el5 #1 SMP Tue 8 17:53:53 EST 2013 x86_64 x86_64 x86_64 gnu/linuxdownload corresponding PostgreSQL

PostgreSQL Quick start: Use of psql tool _ MySQL

I. INTRODUCTION to psql is a PostgreSQL command line interactive client tool, similar to the command line tool sqlplus: 1 in Oracle allows you to interactively type SQL or commands, then they are sent to the PostgreSQL server, and then the SQL or

Pg_dump instance details (backing up PostgreSQL and Greenplum databases)

first, the use of Pg_dump:Import and export of databases is one of the most commonly used features, each of which provides tools for this, such as Oracle's Exp/imp,informix Dbexp/dbimp,mysql mysqldump, and PostgreSQL provides a corresponding tool

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