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
Related
I have some .sql files with thousands of INSERT statements in them and need to run these inserts on my PostgreSQL database in order to add them to a table. The files are that large that it is impossible to open them and copy the INSERT statements into an editor window and run them there. I found on the Internet that you can use the following by navigating to the bin folder of your PostgreSQL install:
psql -d myDataBase -a -f myInsertFile
In my case:
psql -d HIGHWAYS -a -f CLUSTER_1000M.sql
I am then asked for a password for my user, but I cannot enter anything and when I hit enter I get this error:
psql: FATAL: password authentication failed for user "myUsername"
Why won't it let me enter a password. Is there a way round this as it is critical that I can run these scripts?
I got around this issue by adding a new entry in my pg_hba.conf file with the following structure:
# IPv6 local connections:
host myDbName myUserName ::1/128 trust
The pg_hba.conf file can usually be found in the 'data' folder of your PostgreSQL install.
Of course, you will get a fatal error for authenticating, because you do not include a user name...
Try this one, it is OK for me :)
psql -U username -d myDataBase -a -f myInsertFile
If the database is remote, use the same command with host
psql -h host -U username -d myDataBase -a -f myInsertFile
You should do it like this:
\i path_to_sql_file
See:
You have four choices to supply a password:
Set the PGPASSWORD environment variable. For details see the manual: http://www.postgresql.org/docs/current/static/libpq-envars.html
Use a .pgpass file to store the password. For details see the manual: http://www.postgresql.org/docs/current/static/libpq-pgpass.html
Use "trust authentication" for that specific user: http://www.postgresql.org/docs/current/static/auth-methods.html#AUTH-TRUST
Since PostgreSQL 9.1 you can also use a connection string: https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
Use this to execute *.sql files when the PostgreSQL server is located in a difference place:
psql -h localhost -d userstoreis -U admin -p 5432 -a -q -f /home/jobs/Desktop/resources/postgresql.sql
-h PostgreSQL server IP address
-d database name
-U user name
-p port which PostgreSQL server is listening on
-f path to SQL script
-a all echo
-q quiet
Then you are prompted to enter the password of the user.
EDIT: updated based on the comment provided by #zwacky
If you are logged in into psql on the Linux shell the command is:
\i fileName.sql
for an absolute path and
\ir filename.sql
for the relative path from where you have called psql.
export PGPASSWORD=<password>
psql -h <host> -d <database> -U <user_name> -p <port> -a -w -f <file>.sql
Via the terminal log on to your database and try this:
database-# >#pathof_mysqlfile.sql
or
database-#>-i pathof_mysqlfile.sql
or
database-#>-c pathof_mysqlfile.sql
You can give both user name and PASSSWORD on the command line itself with the "-d" parameter
psql -d "dbname='urDbName' user='yourUserName' password='yourPasswd' host='yourHost'" -f yourFileName.sql
you could even do it in this way:
sudo -u postgres psql -d myDataBase -a -f myInsertFile
If you have sudo access on machine and it's not recommended for production scripts just for test on your own machine it's the easiest way.
2021 Solution
if your PostgreSQL database is on your system locally.
psql dbname < sqldump.sql username
If its hosted online
psql -h hostname dbname < sqldump.sql username
If you have any doubts or questions, please ask them in the comments.
Walk through on how to run an SQL on the command line for PostgreSQL in Linux:
Open a terminal and make sure you can run the psql command:
psql --version
which psql
Mine is version 9.1.6 located in /bin/psql.
Create a plain textfile called mysqlfile.sql
Edit that file, put a single line in there:
select * from mytable;
Run this command on commandline (substituting your username and the name of your database for pgadmin and kurz_prod):
psql -U pgadmin -d kurz_prod -a -f mysqlfile.sql
The following is the result I get on the terminal (I am not prompted for a password):
select * from mytable;
test1
--------
hi
me too
(2 rows)
psql -h localhost -d userstoreis -U admin -p 5432 -a -q -f /home/jobs/Desktop/resources/postgresql.sql
Parameter explanations:
-h PostgreSQL server IP address
-d database name
-U user name
-p port which PostgreSQL server is listening on
-f path to SQL script
-a all echo
-q quiet
You can open a command prompt and run as administrator. Then type
../bin>psql -f c:/...-h localhost -p 5432 -d databasename -U "postgres"
Password for user postgres: will show up.
Type your password and enter. I couldn't see the password what I was typing, but this time when I press enter it worked. Actually I was loading data into the database.
I achived that wrote (located in the directory where my script is)
::someguy#host::$sudo -u user psql -d my_database -a -f file.sql
where -u user is the role who owns the database where I want to execute the script then the psql connects to the psql console after that -d my_database loads me in mydatabase finally -a -f file.sql where -a echo all input from the script and -f execute commands from file.sql into mydatabase, then exit.
I'm using:
psql (PostgreSQL) 10.12
on (Ubuntu 10.12-0ubuntu0.18.04.1)
A small improvement in #wingman__7 's 2021 answer: if your username contains certain characters (an underscore in my case), you need to pass it with the -U flag.
This worked for me:
$ psql -h db.host -d db_name -U my_user < query.sql
Try using the following command in the command line console:
psql -h localhost -U postgres -f restore.sql
I'm dealing with psql for the first time and I need a command that executes a .sql file and after executing, it should make a .log file with the script output. I'm looking for something similar to this other command that I use with SQL Server:
sqlcmd -U userid -P password -S serveraddress -i path_to_the_sql_file -o path_where_to_save_log_file
Can you help me, please? :-)
I would spend some time at the psql page.
A quick example:
psql -U userid -h serveraddress -d some_db -f path_to_the_sql_file -L=path_where_to_save_log_file
With Postgres you need to connect to a database with a client. There are other options for inputting commands and capturing output at the link above.
I am trying to automate database creation process with a shell script and one thing I've hit a road block with passing a password to psql.
Here is a bit of code from the shell script:
psql -U $DB_USER -h localhost -c"$DB_RECREATE_SQL"
How do I pass a password to psql in a non-interactive way?
Set the PGPASSWORD environment variable inside the script before calling psql
PGPASSWORD=pass1234 psql -U MyUsername myDatabaseName
For reference, see http://www.postgresql.org/docs/current/static/libpq-envars.html
Edit
Since Postgres 9.2 there is also the option to specify a connection string or URI that can contain the username and password. Syntax is:
$ psql postgresql://[user[:password]#][host][:port][,...][/dbname][?param1=value1&...]
Using that is a security risk because the password is visible in plain text when looking at the command line of a running process e.g. using ps (Linux), ProcessExplorer (Windows) or similar tools, by other users.
See also this question on Database Administrators
From the official documentation:
It is also convenient to have a ~/.pgpass file to avoid regularly having to type in passwords. See Section 30.13 for more information.
...
This file should contain lines of the following format:
hostname:port:database:username:password
The password field from the first line that matches the current connection parameters will be used.
in one line:
export PGPASSWORD='password'; psql -h 'server name' -U 'user name' -d 'base name' -c 'command'
with command a sql command such as "select * from schema.table"
or more readable:
export PGPASSWORD='password'
psql -h 'server name' -U 'user name' -d 'base name' \
-c 'command' (eg. "select * from schema.table")
I tend to prefer passing a URL to psql:
psql "postgresql://$DB_USER:$DB_PWD#$DB_SERVER/$DB_NAME"
This gives me the freedom to name my environment variables as I wish and avoids creating unnecessary files.
This requires libpq. The documentation can be found here.
On Windows:
Assign value to PGPASSWORD: C:\>set PGPASSWORD=pass
Run command: C:\>psql -d database -U user
Ready
Or in one line,
set PGPASSWORD=pass&& psql -d database -U user
Note the lack of space before the && !
This can be done by creating a .pgpass file in the home directory of the (Linux) User.
.pgpass file format:
<databaseip>:<port>:<databasename>:<dbusername>:<password>
You can also use wild card * in place of details.
Say I wanted to run tmp.sql without prompting for a password.
With the following code you can in *.sh file
echo "192.168.1.1:*:*:postgres:postgrespwd" > $HOME/.pgpass
echo "` chmod 0600 $HOME/.pgpass `"
echo " ` psql -h 192.168.1.1 -p 5432 -U postgres postgres -f tmp.sql `
An alternative to using the PGPASSWORD environment variable is to use the conninfo string according to the documentation:
An alternative way to specify connection parameters is in a conninfo
string or a URI, which is used instead of a database name. This
mechanism give you very wide control over the connection.
$ psql "host=<server> port=5432 dbname=<db> user=<user> password=<password>"
postgres=>
If its not too late to add most of the options in one answer:
There are a couple of options:
set it in the pgpass file. link
set an environment variable and get it from there:
export PGPASSWORD='password'
and then run your psql to login or even run the command from
there:
psql -h clustername -U username -d testdb
On windows you will have to use "set" :
set PGPASSWORD=pass and then login to the psql bash.
Pass it via URL & env variable:
psql "postgresql://$USER_NAME:$PASSWORD#$HOST_NAME/$DB_NAME"
Just to add more clarity.
You can assign the password to the PGPASSWORD variable.
So instead of the below which will require you to type the password:
psql --host=aurora-postgres.cluster-fgshdjdf.eu-west-1.rds.amazonaws.com --port=5432 --user=my_master_user --password --dbname=postgres
We will replace the --password flag with PGPASSWORD=QghyumjB3ZtCQkdf. So it will be:
PGPASSWORD=QghyumjB3ZtCQkdf psql --host=aurora-postgres.cluster-fgshdjdf.eu-west-1.rds.amazonaws.com --port=5432 --user=my_master_user --dbname=postgres
This way you will not be required to type the password.
Added content of pg_env.sh to my .bashrc:
cat /opt/PostgreSQL/10/pg_env.sh
#!/bin/sh
# The script sets environment variables helpful for PostgreSQL
export PATH=/opt/PostgreSQL/10/bin:$PATH
export PGDATA=/opt/PostgreSQL/10/data
export PGDATABASE=postgres
export PGUSER=postgres
export PGPORT=5433
export PGLOCALEDIR=/opt/PostgreSQL/10/share/locale
export MANPATH=$MANPATH:/opt/PostgreSQL/10/share/man
with addition of (as per user4653174 suggestion)
export PGPASSWORD='password'
psql postgresql://myawsumuser:myPassword#127.0.0.1:5432/myawsumdb
I have made required entries in .pgpass file with file permission set to 0600.
I am able to connect to db form shell command line without giving the password.
But when I run a shell script which internally queries postgres, it asks to enter password.
I am not able to figure out what could be wrong.
Here is a sample shell script:
#!/bin/bash
source $1
psql -h $DBHOST -d $DBNAME -U $DBUSER << EOF
select * from students limit 10;
EOF
All values for DBHOST, DBNAME and DBUSER are coming fine.
Nevermind.
I made a stupid mistake. I had edited config file on windows. So it had added crlf at the end of every line. So even though it was not visible it was being used when connecting to postgres.
So in command line
this worked.
psql -h 192.168.1.45 -d somedbname -U $somedbuse
But this did not. (after sourcing config file)
psql -h $DBHOST -d $DBNAME -U $DBUSER
I have some .sql files with thousands of INSERT statements in them and need to run these inserts on my PostgreSQL database in order to add them to a table. The files are that large that it is impossible to open them and copy the INSERT statements into an editor window and run them there. I found on the Internet that you can use the following by navigating to the bin folder of your PostgreSQL install:
psql -d myDataBase -a -f myInsertFile
In my case:
psql -d HIGHWAYS -a -f CLUSTER_1000M.sql
I am then asked for a password for my user, but I cannot enter anything and when I hit enter I get this error:
psql: FATAL: password authentication failed for user "myUsername"
Why won't it let me enter a password. Is there a way round this as it is critical that I can run these scripts?
I got around this issue by adding a new entry in my pg_hba.conf file with the following structure:
# IPv6 local connections:
host myDbName myUserName ::1/128 trust
The pg_hba.conf file can usually be found in the 'data' folder of your PostgreSQL install.
Of course, you will get a fatal error for authenticating, because you do not include a user name...
Try this one, it is OK for me :)
psql -U username -d myDataBase -a -f myInsertFile
If the database is remote, use the same command with host
psql -h host -U username -d myDataBase -a -f myInsertFile
You should do it like this:
\i path_to_sql_file
See:
You have four choices to supply a password:
Set the PGPASSWORD environment variable. For details see the manual: http://www.postgresql.org/docs/current/static/libpq-envars.html
Use a .pgpass file to store the password. For details see the manual: http://www.postgresql.org/docs/current/static/libpq-pgpass.html
Use "trust authentication" for that specific user: http://www.postgresql.org/docs/current/static/auth-methods.html#AUTH-TRUST
Since PostgreSQL 9.1 you can also use a connection string: https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
Use this to execute *.sql files when the PostgreSQL server is located in a difference place:
psql -h localhost -d userstoreis -U admin -p 5432 -a -q -f /home/jobs/Desktop/resources/postgresql.sql
-h PostgreSQL server IP address
-d database name
-U user name
-p port which PostgreSQL server is listening on
-f path to SQL script
-a all echo
-q quiet
Then you are prompted to enter the password of the user.
EDIT: updated based on the comment provided by #zwacky
If you are logged in into psql on the Linux shell the command is:
\i fileName.sql
for an absolute path and
\ir filename.sql
for the relative path from where you have called psql.
export PGPASSWORD=<password>
psql -h <host> -d <database> -U <user_name> -p <port> -a -w -f <file>.sql
Via the terminal log on to your database and try this:
database-# >#pathof_mysqlfile.sql
or
database-#>-i pathof_mysqlfile.sql
or
database-#>-c pathof_mysqlfile.sql
You can give both user name and PASSSWORD on the command line itself with the "-d" parameter
psql -d "dbname='urDbName' user='yourUserName' password='yourPasswd' host='yourHost'" -f yourFileName.sql
you could even do it in this way:
sudo -u postgres psql -d myDataBase -a -f myInsertFile
If you have sudo access on machine and it's not recommended for production scripts just for test on your own machine it's the easiest way.
2021 Solution
if your PostgreSQL database is on your system locally.
psql dbname < sqldump.sql username
If its hosted online
psql -h hostname dbname < sqldump.sql username
If you have any doubts or questions, please ask them in the comments.
Walk through on how to run an SQL on the command line for PostgreSQL in Linux:
Open a terminal and make sure you can run the psql command:
psql --version
which psql
Mine is version 9.1.6 located in /bin/psql.
Create a plain textfile called mysqlfile.sql
Edit that file, put a single line in there:
select * from mytable;
Run this command on commandline (substituting your username and the name of your database for pgadmin and kurz_prod):
psql -U pgadmin -d kurz_prod -a -f mysqlfile.sql
The following is the result I get on the terminal (I am not prompted for a password):
select * from mytable;
test1
--------
hi
me too
(2 rows)
psql -h localhost -d userstoreis -U admin -p 5432 -a -q -f /home/jobs/Desktop/resources/postgresql.sql
Parameter explanations:
-h PostgreSQL server IP address
-d database name
-U user name
-p port which PostgreSQL server is listening on
-f path to SQL script
-a all echo
-q quiet
You can open a command prompt and run as administrator. Then type
../bin>psql -f c:/...-h localhost -p 5432 -d databasename -U "postgres"
Password for user postgres: will show up.
Type your password and enter. I couldn't see the password what I was typing, but this time when I press enter it worked. Actually I was loading data into the database.
I achived that wrote (located in the directory where my script is)
::someguy#host::$sudo -u user psql -d my_database -a -f file.sql
where -u user is the role who owns the database where I want to execute the script then the psql connects to the psql console after that -d my_database loads me in mydatabase finally -a -f file.sql where -a echo all input from the script and -f execute commands from file.sql into mydatabase, then exit.
I'm using:
psql (PostgreSQL) 10.12
on (Ubuntu 10.12-0ubuntu0.18.04.1)
A small improvement in #wingman__7 's 2021 answer: if your username contains certain characters (an underscore in my case), you need to pass it with the -U flag.
This worked for me:
$ psql -h db.host -d db_name -U my_user < query.sql
Try using the following command in the command line console:
psql -h localhost -U postgres -f restore.sql