PostgreSQL

Environment: Win7 SP1pg:9.3.5 1, create user postgres, password is also postgres: NET user Postgres Postgres/add 2, in the database root directory to create a data directory: C:\Program FILES\POSTGRESQL\9.3>MD Data 3,

1, ALTER TABLE beijing_line ADD COLUMN source integer;ALTER TABLE beijing_line ADD COLUMN target integer;ALTER TABLE beijing_line ADD COLUMN length double precision;UPDATE beijing_line SET length = st_length (THE_GEOM);PS: Perform the following

Business extension fields are often stored in the database using JSON-formatted data, which involves a headache, assuming that a value in the extension field should be used as a query condition, and PostgreSQL itself supports this query.Example:

1 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

https://www.postgresql.org/download/Download the installer certified by Enterprisedb for all supported PostgreSQL versions.This installer includes the PostgreSQL server, pgadmin; A graphical tool for managing and developing your databases, and

ObjectiveSimply record one of the implementations of PostgreSQL master-slave-asynchronous stream replication based on standby, This is a nice feature that is provided after the postgresql9.x version (2010.9), similar to the log shipping that is

XA is the Distributed transaction Processing specification proposed by Open Group, JTA supports XA specification, JTA only specifies interfaces, some application containers provide implementations, and some three-party open source implementations

--Start the database./bin/aty_ctl-d data-l Arterydb.log Start--Connect to database./bin/atysql-d artery--Set environment variablesExport ld_library_path= '/home/arterydb/lib '--Delete TableDROP TABLE table_name;--whether the query table existsSelect

first, compile and install: Environment Preparation: GNU make version >=3.8 (make--version) Iso/ansi C compiler, at least compatible with C89 standard, GCC or Intel translator, etc. can be gzip, bzip2, tar, source

PostgreSQL database has been widely used as an open source database with strong function. The TSA uses the database to store some of the processed business data. Although PostgreSQL itself provides the command line Interactive client tool Psql, the

operator Description Example Results = Equals Array[1.1,2.1,3.1]::int[] = array[1,2,3] T <> Not equal to array[1,2,3] <> array[1,2,4] T Less than

Schematic installation PostgreSQL"Bo Master" anti-bone Aberdeen "original address"http://www.cnblogs.com/liqingwen/p/5894462.htmlOrderA friend of the "ASP. NET core Project Rights Management System (3) using PostgreSQL through EntityFramework core

Setting up PostgreSQL master server under UbuntuInstall slightlyPostgreSQL master server:$ vi/home/postgresql/data/postgresql.confPress A or I to enter edit modelisten_addresses = ' * 'Wal_level = Hot_standby (default is commented)Max_wal_senders = 5

1.Install PostgreSql9.3 A:yum Install Copy Repository to:/ETC/YUM/YUM.REPOS.D Yum-y Install Postgresql93-server Postgresql93-contrib--skip-broken Yum Install http://yum.postgresql.org/9.5/redhat/rhel-7-x86_64/pgdg-redhat95-9.5-2.noarch.rpm sudo yum

PostgreSQL provides two ways to create a new database: The first is the SQL command that uses the CREATE database. The second is a command-line executable file that uses Createdb.The first is to create a database by using the creation

After several years of renewal and industry recognition of the entity Framework. There are more and more databases that EF can support now. The PostgreSQL database can now use code first to create the database. Not much to say, the following

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

Streaming replication Slots is a pending feature in PostgreSQL 9.4, as part of the logical changeset extraction feature.What is they for, what does need to know, what changes?What is replication slots?Streaming replication slots is a new facility

In the first few chapters of this book, you have learned about various types of replication and how to quota the various kinds of scenarios. Now is the time to make your setup more reliable by adding monitoring.In this chapter, you will learn to

In order to find this information, I can work hard to find a possible Bug in PostgreSQL, and check the source code of PostgreSQL to guess how to obtain fields with the auto-growth attribute. But the overall feeling is much more reasonable than the