I need to export a database I created to get the code for creating the database and inserting rows.
I understand there is a method of using pg_dump, but all the walkthroughs of using it I can find seem to be on Linux.
Can anyone tell me how to do this on Windows?
You have to execute pg_dump located in the bin folder of your PostgreSQL install.
Ex : C:\Program Files\PostgreSQL\9.4\bin.
The command is pg_dump -U *username* -p *port* -d *database* -W -f *filename*
All the parameters are case sensitive ! (Check your username !)
U is for specifying the user that will connect to the DB.
If you don't specify it, pg_dump will use the login you're logged on with.
p for the port. (Default is 5432)
d for the database name
W to force pg_dump to ask for password
f the name of the file where the export should be stored. If you don't specify this, the dump will be displayed in the console.
Example :
pg_dump -U postgres -p 5432 -d postgres -W -f c:\vm\dump.sql
You may need special permissions to export the file to some folders.
(i.e. : C:\program files\ requires administrative rights for writing.)
Related
I have downloaded YELP's sql file and tried to import the sql to my local Postgresql.
I am running postgres on Windows 10 and using Cygwin to execute command that I have found on Google. (it took me forever to use Cygwin instead of windows psql shell)
anyhow, Yelp gives data schema in sql and also data in sql. You may find them a link attached below
https://www.yelp.com/dataset/download
so, basically what I thought was creating an empty table with YELP's schema
the, copy all YELP's data into that table.
pg_dump -h localhost -p 5433 -U postgres -s mydb < D:/YELP/yelp_schema.sql
pg_dump -h localhost -p 5433 -U postgres -d mydb < D:/YELP/yelp_sql-2.tar
and I am checking my database transaction and it doesn't change nothing and i do not see the table.
this is what i see on Cygwin terminal
enter image description here
and nothing on my postgresql database
Please let me know what I have missed.
Thanks a lot
your link asks for email to download. I would suspect yelp to be not transparent for it. So I did not check if they have any advise on their data sets... Anyway you use pg_dump to dump the data. to import the resulting file use psql for plain sql files and pg_restore for custom format ones...
Eg:
psql -h localhost -p 5433 -U postgres -f D:/YELP/yelp_schema.sql
pg_restore -h localhost -p 5433 -U postgres -s worldmap -Ft D:/YELP/yelp_schema.sql
https://www.postgresql.org/docs/current/static/app-pgdump.html
pg_dump — extract a PostgreSQL database into a script file or other
archive file
I want to export my database as a .sql file.
Can someone help me? The solutions I have found don't work.
A detailed description please.
On Windows 7.
pg_dump defaults to plain SQL export. both data and structure.
open command prompt and
run pg_dump -U username -h localhost databasename >> sqlfile.sql
Above command is preferable as most of the times there will be an error which will be something like - ...FATAL: Peer authentication failed for user ...
In windows, first, make sure the path is added in environment variables PATH
C:\Program Files\PostgreSQL\12\bin
After a successful path adding restart cmd and type command
pg_dump -U username -p portnumber -d dbname -W -f location
this command will export both schema and data
for only schema use -s in place of -W
and for only data use -a.
replace each variable like username, portnumber, dbname and location according to your situation
everything is case sensitive, make sure you insert everything correctly,
and to import
psql -h hostname -p port_number -U username -f your_file.sql databasename
make sure your db is created or creation query is present in .sql file
Documentation: https://www.postgresql.org/docs/current/app-pgdump.html
Go to your command line and run
pg_dump -U userName -h localhost -d databaseName > ~/Desktop/cmsdump.sql
I was just following this tutorial HERE, its about, pgrouting, When I run the following command:
psql -U user -d postgres -f ~/Desktop/pgrouting-workshop/data/sampledata_routing.sql
I get an error saying the following:
/var/lib/postgresql/Desktop/pgrouting-workshop/data/sampledata_routing.sql: No such file or directory
On my desktop I do have a folder pgrouting-workshop, which does contain the folder data and the sql dump file.
So why am I getting this error?
Because your Desktop isn't in the postgres user's home directory, located at /var/lib/postgresql, but is instead located at /home/myusername/Desktop?
Presumably the psql command you're running is under a sudo -u postgres -i shell, so ~/ means the postgres user's home directory.
Use ~myusername/Desktop/blahblah. Note that the postgres user may not have permission to access it; you can chmod go+x ~ ~/Desktop (run as your user, not postgres) to change that.
I am setting up a website and am having some trouble restoring a database .dump file. I am using centos7, selinux, postgresql 9.4, and apache2.
This is my pg_hba.conf file.
This is the command I am trying to move the dump:
psql --single-transaction -U postgres db_name < dump_location
When I do this, I get the error:
Permission denied.
Am I missing something or is there someway I should alter my settings? Let me know if you need more information.
Thank you!
The operating system user you are running your shell as does not have permission to read the path dump_location.
Note that this is not necessarily the operating system user you run psql as. In a statement like:
sudo -u postgres psql mydb < /some/path
then /some/path is read as the current user, before sudo, not as user postgres, because it's the shell that performs the input redirection, not psql.
If, in the above example, you wanted to read the file as user postgres you would:
sudo -u postgres psql -f /some/path mydb
That instructs psql to open and read /some/path when it's started.
Just make sure that you are using correct database user and you have at least read permission on the dump file.
"psql -d -U postgres -f "
will work.
I am using PostgreSQL 8.4, and I have some *.sql files to import into a database. How can I do so?
From the command line:
psql -f 1.sql
psql -f 2.sql
From the psql prompt:
\i 1.sql
\i 2.sql
Note that you may need to import the files in a specific order (for example: data definition before data manipulation). If you've got bash shell (GNU/Linux, Mac OS X, Cygwin) and the files may be imported in the alphabetical order, you may use this command:
for f in *.sql ; do psql -f $f ; done
Here's the documentation of the psql application (thanks, Frank): http://www.postgresql.org/docs/current/static/app-psql.html
in command line first reach the directory where psql is present then write commands like this:
psql [database name] [username]
and then press enter psql asks for password give the user password:
then write
> \i [full path and file name with extension]
then press enter insertion done.
Well, the shortest way I know of, is following:
psql -U {user_name} -d {database_name} -f {file_path} -h {host_name}
database_name: Which database should you insert your file data in.
file_path: Absolute path to the file through which you want to perform the importing.
host_name: The name of the host. For development purposes, it is mostly localhost.
Upon entering this command in console, you will be prompted to enter your password.
Be careful with "/" and "\". Even on Windows the command should be in the form:
\i c:/1.sql
Always preferred using a connection service file (lookup/google 'psql connection service file')
Then simply:
psql service={yourservicename} < {myfile.sql}
Where yourservicename is a section name from the service file.
enter image description here
use following command :-
C:\Program Files\PostgreSQL\12\bin>psql -U username -d databasename -f D:\file.sql