如下面的链接所示，你可以使用psql命令来恢复转储文件:

https://www.postgresql.org/docs/8.1/static/backup.html#BACKUP-DUMP-RESTORE

psql dbname < infile

如果你需要设置用户名，只需在命令后添加用户名:

psql dbname < infile username

没有密码提示的最短路径

psql "postgresql://<db_user>:<db_pass>@<ip>:<port>/<db_name>" < "backup.sql"

如果您使用Windows操作系统

psql.exe "postgresql://<db_user>:<db_pass>@<ip>:<port>/<db_name>" < "backup.sql"

如果您已经创建了一个名为mydb的新数据库，使用psql将.sql转储恢复到该数据库，

psql --file=dump.sql --username=postgres --host=localhost --port=5432 mydb

密码将由PSQL提示

连接选项为

  -h, --host=HOSTNAME      database server host or socket directory (default: "/var/run/postgresql")
  -p, --port=PORT          database server port (default: "5432")
  -U, --username=USERNAME  database user name (default: "xyz")
  -w, --no-password        never prompt for password
  -W, --password           force password prompt (should happen automatically)

创建备份

pg_dump -h localhost -p 5432 -U postgres -F c -b -v -f 
"/usr/local/backup/10.70.0.61.backup" old_db

-F c是自定义格式(压缩后，可以与-j N并行)-b是包含blobs， -v是verbose， -F是备份文件名。

从备份恢复

pg_restore -h localhost -p 5432 -U postgres -d old_db -v 
"/usr/local/backup/10.70.0.61.backup"

设置-h localhost - option很重要

根据创建转储文件的方式，有两个工具可供参考。

您的第一个引用源应该是手册页pg_dump，因为它创建了转储本身。它说:

Dumps can be output in script or archive file formats. Script dumps are plain-text files containing the SQL commands required to reconstruct the database to the state it was in at the time it was saved. To restore from such a script, feed it to psql(1). Script files can be used to reconstruct the database even on other machines and other architectures; with some modifications even on other SQL database products. The alternative archive file formats must be used with pg_restore(1) to rebuild the database. They allow pg_restore to be selective about what is restored, or even to reorder the items prior to being restored. The archive file formats are designed to be portable across architectures.

所以这取决于它被倾倒的方式。如果使用Linux/Unix，您可能可以使用excellent file(1)命令来找出它-如果它提到ASCII文本和/或SQL，它应该用psql恢复，否则您可能应该使用pg_restore。

恢复非常简单:

psql -U username -d dbname < filename.sql

-- For Postgres versions 9.0 or earlier
psql -U username -d dbname -1 -f filename.sql

or

pg_restore -U username -d dbname -1 filename.dump

查看它们各自的手册页-有相当多的选项会影响恢复的工作方式。在恢复之前，您可能必须清除“活动”数据库或从template0重新创建它们(正如评论中指出的那样)，这取决于转储是如何生成的。

试试这个:

psql -U <username> -d <dbname> -f <filename>.sql

从。sql文件恢复数据库psql