PostgreSQL

After the PostgreSQL installation is complete, the user, role, and database named Postgres are created by default. You will be prompted with an error when running Psql with your own user.[Email protected]:~"Bob" does not existIf you want to use your

About the use of PostgreSQLPlatform: Ubuntu 12.04 & 14.04Version: PostgreSQL 9.3.4 PostgreSQL installationSee website installation process Add userAfter initial installation, a database named Postgres and a database user named Postgres are generated

My scene is this, there is a table with a field that uses the split string to save the data.Although hibernate itself provides org.hibernate.annotations.Type annotations, it is possible to convert this kind of data by implementing

I've been learning PostgreSQL recently, and here are some of the common commands that I've compiled for PostgreSQL. Connect to the database, the default user and database is PostgresPsql-u user-d dbname switch databases, equivalent to MySQL's use

Unlike Oracle, PostgreSQL requires manual control of partition rule triggers.Step one: Create a partitionCREATE table table_partition_1 (CHECK partition_column criteria) inhenrits (table)Step Two: Create a PK and index for the partition table, use

db=# \helpAvailable Instructions:ABORTALTER AGGREGATEALTER COLLATIONALTER CONVERSIONALTER DATABASEALTER DEFAULT PrivilegesALTER DOMAINALTER EVENT TRIGGERALTER EXTENSIONALTER FOREIGN DATA WRAPPERALTER FOREIGN TABLEALTER FUNCTIONALTER GROUPALTER

Postgresql's .gz package can be downloaded from csdn. PostgreSQL's official website does not seem to be available. Decompress the package and enter its folder. Then, run the following command: ./Configure The system may not find two packages.

ArticleDirectory Pgsql can set one master and multiple slave, so we need a way to achieve read/write separation in the program, query the internet, and find the following solution, please test the following ideas and solutions in future

PostgreSQL manages database access permissions through roles. we can regard a role as a database user or a group of database users. Roles can have database objects, such as tables and indexes, or grant permissions on these objects to other roles to

Name Drop table -- delete a table Synopsis Drop TableName[,...] [Cascade | restrict] Description Drop tableDelete a table or view from a database. Only the owner of a table or view can be deleted. To clear a table without deleting the table,

Recently, I am preparing to create a project to use PostgreSQL. Of course, I have to install PostgreSQL on the server. The installation is a little more troublesome than MySQL, and the record is as follows. 1. Compile and install PostgreSQL 8.4.2

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

I. Introduction PostgreSQL is a very complex object-relational database management system (ordbms). It is also currently the most powerful, feature-rich and complex free software database system. Some features are not even available in commercial

1. Operating System Information: Red Hat Enterprise Linux 4 2. Download the PostgreSQL source code: PostgreSQL. 3.upload and download the sql-8.4.2.tar.gz to the/OPT directory. 4. Create a Postgres user and DBA group, and switch to Postgres

Configuration Files --> -- cache size, number of logs reached, and then written to the database. Set this parameter to 1, is to see the effect -- this is the control of the client required by PostgreSQL. Use

Introduction:This note describes ways to implement high availibility (HA) for PostgreSQL. HA gives the ability to transparently fail-over database connections to an alternative system in the event of some sort of failure of the primary

Vacuum is an important task in PostgreSQL database management. The reason is as follows: Release the disk space occupied by update/delete rows. Updates the statistics used in the PostgreSQL query plan. This prevents old data from being lost due

Name PREPARE -- create a prepared Query Synopsis PREPARE plan_name [ (datatype [, ...] ) ] AS statementDescription PREPARECreate a prepared query. A Prepared query is a server-side object that can be used to optimize performance. In

Author: HiLoveS) Blog: http://www.cnblogs.com/hiloves/ Reprinted please keep this information 　 I recently tried PostgreSQL 9.04 and shared my experiences with pg_mirror.conf configuration. Pg_cmd.conf is the configuration file for client

After postgresql is installed, you cannot use other accounts to execute the following commands. By default, you can use the postgres account.   Createdb dbname Create a new database. If no database name is added, create a database name with the