How do i back up postgres database?

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i am using postgresql database for web application.i want to backup my application database how can i do?
thank you

What I have tried:

I tried backup in postgresql tools but iam getting error like this
--format custom --blobs --encoding UTF8 --verbose --file "F:\PostgreSql_Backups\Public.backupnew1" \"SNCF\"
pg_dump: [archiver (db)] connection to database ""SNCF"" failed: FATAL: database ""SNCF"" does not exist
pg_dump: *** aborted because of error

Process returned exit code 1.

Posted 2-Mar-16 21:29pm

User-11630313

Updated 2-Mar-16 22:16pm

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Richard MacCutchan 3-Mar-16 3:33am

The error message is quite clear: which part of "failed: FATAL: database ""SNCF"" does not exist" are you having trouble with?

User-11630313 3-Mar-16 3:34am

but i have database SNCF

Richard MacCutchan 3-Mar-16 4:41am

Check your command options as specified in http://www.postgresql.org/docs/9.5/static/app-pgdump.html.

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Maciej Los · Answer 1 · 2016-03-02T22:16:00

I'd suggest to read Richard MacCutchan[^] comment to the question and the documentation[^].

Quote:
If you have problems running pg_dump, make sure you are able to select information from the database using, for example, psql[^]. Also, any default connection settings and environment variables used by the libpq front-end library will apply.

Note, that proper command is: pg_dump [connection-option...] [option...] [dbname]