PostgreSQL

Often add partitioned tables, and clean up partitioned tables, very simple 2 functions--Add partition table CREATE OR REPLACE function create_table (table_name character Varying,table_num integer ) RETURNS void LANGUAGE Plpgsql as $function $

Postgresql.cmd@echo offtitle PostgreSQLrem 变量设置if not defined PGSQL set PGSQL=%~dp0if not defined PGLOCALDIR set PGLOCALDIR=%PGSQL%shareif not defined PGDATABASE set PGDATABASE=postgresif not defined PGPORT set PGPORT=5432if not defined PGUSER set

due to development requirements:(1) Create a readonly user on multiple PostgreSQL instacne, only have SELECT permission on the table or view (including materialized view) in the database, and have SELECT permission for the newly created table and

For PostgreSQL database, here are the common commands for your own PostgreSQLIn Windows DOS window connection database, the default user and database is PostgresPsql-u user-d dbnameswitch databases, equivalent to MySQL's use dbname\c dbnameEnumerate

The first time you encounter a remote access PostgreSQL database in a project, there are often errors connecting to the database, and the connection string is garbledSolution SolutionsTo add a connection string to a configuration file"information"

PostgreSQL database data simple import and export Blog categories: DataBase Postgres Command operation:Data export: Pg_dump-u postgres (user name) (-t table name) database name (default with username) > C:\fulldb.sqlImport of data: Psql-u

N-more SQL statements, but their own time, but everywhere is the pit ah, ah, ah!!!!!!!!!!!!!!!Want to write a get the latest ID value in the table.On the CodeCREATE TABLEDepartment (IDINT PRIMARY KEY not NULL, D_codeVARCHAR(

The installation process is simply carried over:1. Before looking at the code, we need to load npgsql and Petapoco into the current project, and I will use NuGet to add to the current project as follows:Install-package NpgsqlInstall-package Petapoco2

1. Function Description:Date_trunc: Intercept a given time (timestamp,date) to get the initial time of the specified precision (time, day, month, year)2. General TimeDate_trunc (' Hour ', TIMESTAMP ' 2018-08-16 20:38:40 ')Result:2018-08-16

Today we are using Docker-compose to quickly install a DJANGO+POSTGRESQL development environment.Compose introductionCompose positioning is "defining and running complex applications with Docker", formerly Fig, compatible with fig template

PostgreSQL supports hstore to store data such as Key->value, which is in fact similar to array or JSON type. Efficient indexing is essential to the efficient use of this type of data. Let's take a look at the performance issues of two different

1 PackageMyDB2 3 Import (4"Database/sql"5"Errors"6 7_ "GITHUB.COM/LIB/PQ"8 )9 Tenvar db *sql. DB =Nil One A func opensql () error { -var err error =Nil -DB, err = sql. Open ("Postgres", "port=5432 user=postgres password=123456 dbname=postgres

PostgreSQL implements table inheritance, a feature that is an effective tool for database designers. The SQL99 and later standards define the type inheritance characteristics, which are different from the many features we describe here.Let's start

1, configuration FilesThe configuration file controls the basic behavior of a PostgreSQL server instance, mainly including postgresql.conf, pg_hba.conf, pg_ident.conf(1) postgresql.confThis file contains common settings such as memory allocation,

1. Brief description we know that the Sqlplus inside Oracle executes DML statements; commit commits are required; if it is wrong, you can roll back the rollback; however, the default is auto-commit in PostgreSQL, and submit it immediately

There is several ways to determine the effect of a command. The first method is for use the GETDiagnostics command, which has the form:GET [Current] diagnostics Variable {= |: =} Item [, ...];This command allows retrieval of system status indicators.

Original: http://blog.csdn.net/kanon_lgt/article/details/5931522Look at the official documents of POSTGRESQL9, the more I look confused, this table space, database, mode, table, user, role relationship between how in PostgreSQL so chaotic?After a

5.3 Redundancy and stop replicationWhen it comes to synchronous replication, there is a phenomenon that must not be missed. Imagine that we have a two-node cluster with synchronous replication. What happens if a slave failure occurs? The answer is

[email protected] ~]# Cd/home[[email protected] home]# lsPostgresql-9.4.1.tar Test[email protected] home]# tar XF postgresql-9.4.1.tar[email protected] home]# CD postgresql-9.4.1[[email protected] postgresql-9.4.1]# lsACLOCAL.M4 Config Configure

PostgreSQL Quick Start How to install and configure the PostgreSQL server in Ubuntu Introduction PostgreSQL is a powerful relational database management system, which is released in accordance with the BSD license [1. PostgreSQL contains many