查看“Postgresql基础”的源代码

PostgreSQL is available in all Ubuntu versions by default.

=== Install ===
 sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
 wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
 sudo apt-get update
 sudo apt-get -y install postgresql

安装完毕后，系统会创建一个数据库超级用户 postgres，密码为空。

=== DBA ===

==== Start ====
 # 需要 root 权限
 /etc/init.d/postgresql start | stop | restart
 systemctl start | stop | restart | status postgresql

==== 执行SQL ====
 psql -c "$SQL"

==== show databases ====
 \l
 select * from pg_database;

==== connect databases ====
 \c postgres

==== show tables ====
 \dt
 \dt+           # 表类型、大小