starting postgresql and pgadmin in windows without installation

Thank you. This worked for me. But, i was getting error while starting psql.exe

The error was "psql: FATAL : role [user] does not exist."

To resolve this, i followed the below steps:

1. Be on the same folder path (where you have initdb.exe) i.e. source-folder/pgsql/bin
2. Run "psql -U postgres". This will ask for password.
3. Now enter the password that was set during postgres intialization. This will open the psql command prompt.

Hope this helps.. :)

I tried above method its working fine, but when i tried to connect it via JDBC i used to get

"The authentication type 10 is not supported. Check that you have configured the pg_hba.conf file to include the client's IP address or subnet, and that it is using an authentication scheme supported by the driver."

This happens because scram-sha-256 has some issue(refer here), i couldn't understand in depth, so i changed it to md5, All started to work smoothly.hope it helps

.\initdb -D D:\database\dbdata -U postgres -W -E UTF8 -A md5

1. Download the ZIP file from https://www.enterprisedb.com/download-postgresql-binaries

2. Unzip the archive into a directory of your choice (the archive is created such that unzipping it, it will create a directory pgsql with everything else below that)

3. Run initdb (this can be found in the subdirectory pgsql\bin)

    initdb -D c:\Users\Arthur\pgdata -U postgres -W -E UTF8 -A scram-sha-256
   

   This will create the postgres "data directory" (aka the "cluster") in c:\Users\Arthur\pgdata. You need to make sure that the user running this command has full read/write privileges on that directory.

   -U postgres creates the superuser as postgres, -W will prompt you for the password of the superuser, -E UTF8 will create the database with UTF-8 encoding and -A scram-sha-256 enables the password authentication.

4. To start Postgres, run:

    pg_ctl -D c:\Users\Arthur\pgdata -l logfile start
   

   this has(!) to be done as the user who ran initdb to avoid any problems with the access to the data directory.

5. To shutdown Postgres, run:

    pg_ctl -D c:\Users\Arthur\pgdata stop
   

6. psql.exe (the command line client) is located in the bin directory. Starting with Postgres 9.6 the pgAdmin executable pgAdmin4.exe is located in the sub-directory "pgAdmin 4\bin".

7. Optionally create a Windows service to automatically run Postgres (must be run using a Windows administrator account)

    pg_ctl register -N postgresql -D c:\Users\Arthur\pgdata