PostgreSQL

Pg_stat_statements is postgresql an extension module, the main record of SQL run information Use this module must increase this parameter shared_preload_libraries to postgresql.conf, and need to restart the database 1. Installation module download

First, overview: A database can be considered a named collection of SQL objects (database objects), and typically, each database object (table, function, and so on) belongs to only one database. However, for some system tables, such as Pg_database,

DescriptionThe Postgres is installed before Pgbouncer is installedSoftware Download:wget https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gzwget http://pgfoundry.org/frs/download.php/3393/pgbouncer-1.5.4.tar.gzCompile and

The recent development of a Web ETL tool requires a different data source. The first time you find a double quote with PostgreSQL raises the question:Standard SQL is case-insensitive. However, PostgreSQL allows for the use of case-sensitive

9.5.4 database Fast Insert large amount of data research backgroundIn some scenarios, it is necessary to quickly load large amounts of data into the Abase database, such as database migrations, SQL log analysis, and so on. There are several

Password file for the PostgreSQL client command:Before giving other PostgreSQL client commands, we need to introduce the password file in PostgreSQL. This document is described in advance here because we will apply the file extensively in the

1, the concept of businessA transaction is a concept that introduces a database from real life, that is, operations within a transaction, either wholly or completely. Just like a bank transfer, when a portion of the money is transferred from one

Today in the study of checkpoint process problems, by the way review the checkpoint set up the problem, there are new doubts.Checkpoint also known as checkpoint, the occurrence of checkpoint in Oracle means that the previous dirty data is all

I wrote a SQL at work today, but PostgreSQL always prompts for grammatical errors and makes a simple record: question 1, "and" "single and double quotes As an example:1 #1,selectfromwhere id=""; 2 #2,selectfromwhere id=';The above two sentences of

1.1.1 Software Installation1. set user groups and user levelsPostgresql cannot run as root and will run as a different identity, so the corresponding users and groups must be established. (1) New Database user groups: Groupadd Database(2) New Pgsql

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

There are three completely different ways to back up PostgreSQL data:· SQL Dump· file system level backup· Online Backup First, SQL DumpSQL dump uses the pg_dump utility to export the current block of data to a SQL file, and when the database

Org.postgresql.util.PSQLException: Field index exceeds license range: 3, Number of columns: 2.Today, after writing the SQL query, the background has been error display the above information. Looking at the error for no reason at all, we re-examined

PostGIS installation using PostgreSQL in the bin directory under StackbuilerPostGIS1. Build the Table statement:Create Table not NULL 4326 NULL ); The field geometry represents the point of the three-dimensional space, and the two-dimensional

PostgreSQL supports the basic table partitioning feature. This article describes why table partitioning is required and how table partitioning is used in database design.1. OverviewPartitioning means dividing a large logical table into physical

Original--http://www.tuicool.com/articles/mmvarfLet's talk about the limitations of Slony:1. DDL actions are not copied to;2. If you want to use Slony to synchronize data, the table must be a primary keyThe content of everyone to see the original ,

1. Environment preparation1.1 Win7 x64 system1.2 Postgresql-9.1.13-windows-binaries.zip and Mysql-5.5.46-win32.zip2. Installation process2.1 Postgresql-9.1.13 installation process① extract the Zip-format installation package to a folder, such as

2.2 Xlog and ReplicationIn this chapter, you have learned that the transaction log for PostgreSQL has made all changes to the database. The transaction log itself is packaged as an easy-to-use 16MB segment.The idea of using this change set to

Scala and SBT are installed by default and have a basic understanding of SBT and know how to build a project with SBT.Add dependencyTo use the PostgreSQL database in Scala, you need to import PostgreSQL driver-related library files, PostgreSQL

Find an article on the Internet titled PostgreSQL windows automatic backup script Http://blog.it580.com/1910     I thought it was good. After a try, I found that the execution of the batch processing file was stopped and I was prompted to enter the