To tell the truth, my LAMP site, in fact, can not forget this elephant. MySQL is a brisk dolphin, but lacks many of the characteristics of modern relational databases, such as referential integrity, views, triggers, and so on. So if you need to develop an ecommerce site that requires these features, you might want to consider PostgreSQL. This article will briefly describe its usage by installing the process on Red Hat 7.1.
PostgreSQL's Official download address is:
If you download the latest development version, you will need to download and install Flex (version number greater than 2.5.4) and Bison (version number greater than 1.28)
Designers must establish corresponding users and groups for security reasons, PostgreSQL cannot run as root.
# Useradd Postgre (automatically set up Postgre group)
The installation process is not complicated and is similar to other source version installation methods:
# tar Xvfz postgresql-7.1.3.tar.gz
# CD postgresql-7.1.3
# make Install
# Chown-r Postgre.postgre/usr/local/pgsql
This is not the end of the installation, there are some finishing work to do:
# VI ~postgre/.bash_profile
Export Pglib pgdata PATH Manpath
Log in as a postgres user,
To create a database directory:
$ mkdir Data
To start the database engine:
[Postgre@www postgre]$ Initdb
This database system'll is initialized with username "Postgre".
This user would own all the data files and must also own the server process.
Fixing permissions on pre-existing data directory/home/postgre/data
Creating database System Directory/home/postgre/data/base
Creating Database XLOG Directory/home/postgre/data/pg_xlog
Creating Template Database In/home/postgre/data/base/template1
Creating Global Relations In/home/postgre/data/base
Adding Template1 database to Pg_database
Creating View Pg_user.
Creating View Pg_rules.
Creating View Pg_views.
Creating View Pg_tables.
Creating View pg_indexes.
Success. The can now start the database server using:
$ postmaster-i-D ~/data &
[Postgre@www postgre]$ Debug:data Base System is starting up at Thu 31 02:00:44 2002
Debug:data Base System is shut down at Thu 31 01:57:58 2002
Debug:data Base System is in production to Thu 31 02:00:44 2002
This allows PostgreSQL to use the database located in/usr/local/pgsql/data, allowing Internet users to connect (-i) and run in the background.
Building a Database
PostgreSQL will return "CREATED database" to indicate that the databases have been set up.
Enter the interactive Psql tool to create the table:
CREATE TABLE MyTable (
ID varchar (20),
Name varchar (30));
After the establishment is completed, a "CREATED" message is obtained, indicating a successful establishment. Now insert a piece of data:
INSERT into mytable values (' Author ', ' Xu yongjiu ');
Psql returns insert 18732 1, query Insert succeeded:
SELECT * from MYTABLE;
Exit psql, use Q command