这篇文章主要介绍了PostgreSQL 实现登录及修改密码操作，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧。
PostgreSQL登录
1、可通过客户端pgAdmin III直接登录
2、可通过命令行
命令：psql -h 10.10.10.10 -U user -d postgres -p 5570
-h：数据库IP
-U：登录用户
-d：登录的数据库
-p：登录端口
方法：进入postgreSQL的客户端安装目录（我的安装目录：C:Program FilesPostgreSQL9.4bin），执行psql命令，其中q表示退出数据库
修改密码
直接执行以下sql即可修改密码
1alter user pguser with password 'new password';
补充：PostgreSQL修改密码认证方式
我就废话不多说了，大家还是直接看代码吧~
[postgres@postgres_vm ~]$ psql
psql (12.4)
Type "help" for help.
postgres=# show password_encryption ;
password_encryption
---------------------
md5
(1 row)
postgres=# select * from pg_authid where rolname='hr';
oid | rolname | rolsuper | rolinherit | rolcreaterole | rolcreatedb | rolcanlogin | rolreplication | rolbypassrls | rolconnlimit | r
olpassword | rolvaliduntil
-------+---------+----------+------------+---------------+-------------+-------------+----------------+--------------+--------------+--------------
-----------------------+---------------
16386 | hr | f | t | f | f | t | f | f | -1 | md566ad2e6b6f
adaa9fd11bfcab906e84c8 |
(1 row)
postgres=# set password_encryption to "scram-sha-256";
SET
postgres=# select * from pg_authid where rolname='hr';
oid | rolname | rolsuper | rolinherit | rolcreaterole | rolcreatedb | rolcanlogin | rolreplication | rolbypassrls | rolconnlimit | r
olpassword | rolvaliduntil
-------+---------+----------+------------+---------------+-------------+-------------+----------------+--------------+--------------+--------------
-----------------------+---------------
16386 | hr | f | t | f | f | t | f | f | -1 | md566ad2e6b6f
adaa9fd11bfcab906e84c8 |
(1 row)
postgres=# alter user hr with password 'Abcd1234';
ALTER ROLE
postgres=# select * from pg_authid where rolname='hr';
oid | rolname | rolsuper | rolinherit | rolcreaterole | rolcreatedb | rolcanlogin | rolreplication | rolbypassrls | rolconnlimit |
rolpassword | rolvaliduntil
-------+---------+----------+------------+---------------+-------------+-------------+----------------+--------------+--------------+--------------
-------------------------------------------------------------------------------------------------------------------------+---------------
16386 | hr | f | t | f | f | t | f | f | -1 | SCRAM-SHA-256
$4096:dF5WnZnKGXen0mtqZeWldA==$2K8sshkEarHox93X5hmIjKSPxHecXDkjZ56erjIf+dU=:FBbY3+22nVXF83LbfK6DHBK2QpakJA/0RRI3oXs4cdI= |
(1 row)
postgres=#
文章来源：脚本之家
来源地址：https://www.jb51.net/article/204344.htm
