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這篇文章主要介紹了PostgreSQL 實(shí)現(xiàn)登錄及修改密碼操作，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過(guò)來(lái)看看吧。

PostgreSQL登錄

1、可通過(guò)客戶端pgAdmin III直接登錄

2、可通過(guò)命令行

命令：psql -h 10.10.10.10 -U user -d postgres -p 5570

-h：數(shù)據(jù)庫(kù)IP

-U：登錄用戶

-d：登錄的數(shù)據(jù)庫(kù)

-p：登錄端口

方法：進(jìn)入postgreSQL的客戶端安裝目錄（我的安裝目錄：C:\Program Files\PostgreSQL\9.4\bin），執(zhí)行psql命令，其中\(zhòng)q表示退出數(shù)據(jù)庫(kù)

修改密碼

直接執(zhí)行以下sql即可修改密碼

1alter user pguser with password 'new password';

補(bǔ)充：PostgreSQL修改密碼認(rèn)證方式

我就廢話不多說(shuō)了，大家還是直接看代碼吧~

[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=#

文章來(lái)源：腳本之家

來(lái)源地址：https://www.jb51.net/article/204344.htm

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