Postgresql 中数据库的备份

Examples

To dump a database called mydb into a SQL-script file:

 $pg_dump mydb > db.sql

To reload such a script into a (freshly created) database named newdb:

 $psql -d newdb -f db.sql

To dump a database into a custom-format archive file:

 $pg_dump -Fc mydb > db.dump

To reload an archive file into a (freshly created) database named newdb:

 $pg_restore -d newdb db.dump

To dump a single table named mytab:

 $pg_dump -t mytab mydb > db.sql

To dump all tables whose names start with emp in the detroit schema,except for the table named employee_log:

 $pg_dump -t 'detroit.emp*' -T detroit.employee_log mydb > db.sql

To dump all schemas whose names start with east or west and end in gsm,excluding any schemas whose names contain the word test:

 $pg_dump -n 'east*gsm' -n 'west*gsm' -N '*test*' mydb > db.sql

The same,using regular expression notation to consolidate the switches:

 $pg_dump -n '(east|west)*gsm' -N '*test*' mydb > db.sql

To dump all database objects except for tables whose names begin with ts_:

 $pg_dump -T 'ts_*' mydb > db.sql

To specify an upper-case or mixed-case name in -t and related switches,you need to double-quote the name; else it will be folded to lower case (see Patterns). But double quotes are special to the shell,so in turn they must be quoted. Thus,to dump a single table with a mixed-case name,you need something like

 $pg_dump -t '"MixedCaseName"' mydb > mytab.sql

以上命令在执行的过程中需要加上常用连接数据库的命令

例如：利用自定义格式进行备份

pg_dump -h localhost -U wyh -d -Fcdatabasename >d:/databasename.dump