如果你有一个备份SQL文件，那么你可以很容易地恢复它。 只要按照下面给出的说明做就可以了

1. At first, create a database using pgAdmin or whatever you want (for example my_db is our created db name)
2. Now Open command line window
3. Go to Postgres bin folder. For example:  cd "C:\ProgramFiles\PostgreSQL\pg10\bin"
4. Enter the following command to restore your database: psql.exe -U postgres -d my_db -f D:\Backup\backup_file_name.sql 

如果需要，请为postgres用户输入密码，然后让postgres执行它的工作。查看恢复进程。

如果您使用pg_dump创建了备份，您可以通过以下方式轻松地恢复它:

打开命令行窗口 进入Postgres bin文件夹。例如:cd "C:\ProgramFiles\PostgreSQL\9.5\bin" 输入恢复数据库的命令。例如:psql.exe -U postgres -d YourDatabase -f D:\Backup\.sql 输入postgres用户的密码 检查恢复进程

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。

Backup:  $ pg_dump -U {user-name} {source_db} -f {dumpfilename.sql}

Restore: $ psql -U {user-name} -d {desintation_db} -f {dumpfilename.sql}

请看下面的例子，它的工作

C:/Program Files/PostgreSQL/9.4/bin\pg_restore.exe——host localhost——port 5432——username "postgres"——dbname "newDatabase"——no-password——verbose

“C: \用户下载\优\ \新下载\ DB.backup”