PostgreSQL

Yum Install http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-redhat94-9.4-1.noarch.rpmYum Install Postgresql-serverThe following problems were found: error:package:postgresql93-contrib-9.3.5-1pgdg.rhel6.i686 (pgdg93) requires:libcrypto.so.10 (

Service PostgreSQL Start[....] Starting PostgreSQL 9.1 database server:main[...] The PostgreSQL server failed to start. Please check the log output:2015-02-07 18:52:12 CST log:could not translate host name "localhost" and service "5432" to add

PostgreSQL inside to full-text search or fuzzy query plus index speed, there will generally be two options, one is gist type, one is the gin type, the official website gives the following reference:There is substantial performance differences

First, install the associated dependent libraries:1) GNU makeGNU make is required and the version is greater than or equal to 3.76.1, check the Gmake method:Gmake--versioninstallation command:Yum-y Install make2) zlibPostgreSQL uses zlib compression

PostgreSQL Add a self-increment constraint ALTER TABLE table_name ALTER COLUMN COLUMN_NAME SET default Nextval (' Seq_name '); If you need to build a seq_name sequence, How does the trigger function of PostgreSQL debug? Self-addressed, equipped with

5.5. Modify the tableIf you create a table and find yourself making a mistake, or if your application needs have changed, you can delete the table and recreate it. But if the table is already populated with a lot of data, or if the table is already

PostgreSQL function is huge, to achieve multiplication this kind of operation has many methods, today I will briefly enumerate the following several convenient ways.Like we're counting 10!1, you can use SQL to expand it:t_girl=# Select 1*2*3*4*5*6*7*

Installation:Yum install Postgresql-serverservice PostgreSQL initdbchkconfig PostgreSQL onPostgreSQL by default, remote Access does not succeed, and if you need to allow remote access, you need to modify two configuration files, as described below:#

First, find out the statementSelect Wait.pid, wait.query as Wait_query, Wait.query_start as Wait_query_start, Wait.locktype, granted . pid as Waitfor_pid, Granted.relation, Granted.datname|| '. ' | | D.nspname | | '. ' | |C.relname as name,

Yesterday I used MySQL to implement the Oracle recursive statement connect by, which looks slightly more complicated. See how PostgreSQL is implementing connect by for Oracle today.or using the same table and data as yesterday. PostgreSQL prides

Yesterday I used MySQL to implement the Oracle recursive statement connect by, which looks slightly more complicated. See how PostgreSQL is implementing connect by for Oracle today.or using the same table and data as yesterday. PostgreSQL prides

Delete the Psql database: (in the case of the database Django name:)Dropdb Django;Create a new database and belong to Django:Createdb Django-o Django When we use the Python manage.py syncdb in Django, we create a new table for the

What is PostgreSQL? How do I pronounce it? What is Postgres again?PostgreSQL read as Post-gres-q-lPostgreSQL is a goal-oriented relational database system that has all the functions of a traditional business database system and also features

-------------------------------------------------------------------------------------------------------Directory:--1. Database----1.1 Creating a database----1.2 Deleting a database--2. Architecture----2.1 Creating schemas----2.2 Deleting schemas--3.

1. Open the SQL Shell under the PostGIS installation path and the command Line dialog box will appear2. Enter login database such as user name password3. Typing the CREATE DATABASE command:CREATE DATABASE MyDatabase;4. Add a space extension to the

1,Greatest (n1,n2,n3,..........) Get maximum valueTestdb= #SELECT Greatest (3,5,1,8, -, About, the, -, the, +); +---------------------------------------------------------+ | Greatest (3,5,1,8, -, About, the, -, the, +) | +--------

In PostgreSQL we tend to use select stored procedures in executing stored procedures, but if the stored procedure is called again, it cannot be used, and the perform stored procedure should be used to see the description of the official

Export a remote database1. Export the threshold table structure and data to the file Threshold.sql from the database monitor on the remote database IP:Pg_dump-t threshold-h 135.32.94.142 monitor-u monitor-p 5432- F Threshold.sql-t specifies the

1. PG default without UUID support, need to manually add 2. The software compiles with UUID support:--WITH-UUID=E2FS (there are three options, BSD,E2FS,OSSP). Need to install the dependent package libuuid-devel.x86_643 first. Enter the contrib

SELECT * from Pg_class c,pg_attribute a,pg_type t where c.relname= ' bookkindlist ' and a.attnum>0 and a.attrelid=c.oid an D a.atttypid=t.oidselect a.attname from Pg_class c,pg_attribute a,pg_type t where c.relname= ' bookkindlist ' and A.ATTNUM&G T;