Postgresql学习笔记-1(debian安装)


  • 安装
admin@d19bfec087dc:~$ sudo apt-get install postgresql postgresql-client postgresql-server-dev-all

安装完成后,PostgreSQL默认创建了名为postgres用户,并创建了postgres的Linux系统账户,PostgreSQL的默认数据库是template1,在postgres的系统账户下可以用命令行管理工具psql来管理它。

  • 启动postgres服务
admin@d19bfec087dc:~$ sudo /etc/init.d/postgresql start
Starting PostgreSQL 9.4 database server: main.
admin@d19bfec087dc:~$
  • 查看是否启动成功
admin@d19bfec087dc:~$ ps -aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.2  55168  5416 ?        Ss   02:23   0:00 /usr/sbin/sshd -D
root         8  0.0  0.0   4328   772 ?        Ss   02:23   0:00 sh
root        54  0.0  0.1  91168  3052 ?        Ss   02:24   0:00 nginx: master process /usr/sbin/nginx
www-data    55  0.0  0.1  91532  3740 ?        S    02:24   0:00 nginx: worker process
www-data    56  0.0  0.1  91532  3740 ?        S    02:24   0:00 nginx: worker process
www-data    57  0.0  0.1  91532  3740 ?        S    02:24   0:00 nginx: worker process
www-data    58  0.0  0.1  91532  3740 ?        S    02:24   0:00 nginx: worker process
postgres   294  0.0  1.0 225108 21380 ?        S    02:37   0:00 /usr/lib/postgresql/9.4/bin/postgres -D /var/lib/postgresql/9.4/main -c config_file=/etc/post
postgres   296  0.0  0.2 225108  4236 ?        Ss   02:37   0:00 postgres: checkpointer process                                                               
postgres   297  0.0  0.2 225108  5872 ?        Ss   02:37   0:00 postgres: writer process                                                                     
postgres   298  0.0  0.2 225108  4236 ?        Ss   02:37   0:00 postgres: wal writer process                                                                 
postgres   299  0.0  0.3 225548  6616 ?        Ss   02:37   0:00 postgres: autovacuum launcher process                                                        
postgres   300  0.0  0.2  80388  4464 ?        Ss   02:37   0:00 postgres: stats collector process                                                            
root       346  0.0  0.1  39980  3096 ?        S    02:44   0:00 sudo login admin
root       347  0.0  0.1  63300  2820 ?        S    02:44   0:00 login      
admin      349  0.0  0.1  20208  3240 ?        S    02:44   0:00 -bash
admin      392  0.0  0.1  17492  2072 ?        R+   02:51   0:00 ps -aux
admin@d19bfec087dc:~$
  • 切换到postgres用户
admin@d19bfec087dc:~$ sudo su postgres
[sudo] password for admin: 
postgres@d19bfec087dc:/home/admin$
  • 登录数据库
postgres@d19bfec087dc:/home/admin$ psql
psql (9.4.5)
Type "help" for help.

postgres=#
  • 显示数据库列表
postgres=# \l
                             List of databases
   Name    |  Owner   | Encoding  | Collate | Ctype |   Access privileges   
-----------+----------+-----------+---------+-------+-----------------------
 postgres  | postgres | SQL_ASCII | C       | C     | 
 template0 | postgres | SQL_ASCII | C       | C     | =c/postgres          +
           |          |           |         |       | postgres=CTc/postgres
 template1 | postgres | SQL_ASCII | C       | C     | =c/postgres          +
           |          |           |         |       | postgres=CTc/postgres
(3 rows)

postgres=#
  • 链接数据库template1
postgres=# \c template1
You are now connected to database "template1" as user "postgres".
template1=#
  • 显示数据表
template1=# \dl
      Large objects
 ID | Owner | Description 
----+-------+-------------
(0 rows)

template1=#
  • 退出
template1=# \q
postgres@d19bfec087dc:/home/admin$

转载自:https://blog.csdn.net/bluefish_ygz/article/details/50338697

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