What is the format for the PostgreSQL connection string / URL?

Question

What is the format for the PostgreSQL connection string (URL postgres://...) when the host is not the localhost?

Answer 1

If you use Libpq binding for respective language, according to its documentation URI is formed as follows:

postgresql://[user[:password]@][netloc][:port][/dbname][?param1=value1&...]

Here are examples from same document

postgresql://
postgresql://localhost
postgresql://localhost:5432
postgresql://localhost/mydb
postgresql://user@localhost
postgresql://user:secret@localhost
postgresql://other@localhost/otherdb?connect_timeout=10&application_name=myapp
postgresql://localhost/mydb?user=other&password=secret

Answer 2

The following worked for me

const conString = "postgres://YourUserName:YourPassword@YourHostname:5432/YourDatabaseName";

Answer 3

DATABASE_URL=postgres://{user}:{password}@{hostname}:{port}/{database-name}

Answer 4

Here is the documentation for JDBC, the general URL is "jdbc:postgresql://host:port/database"

Chapter 3 here documents the ADO.NET connection string, the general connection string is Server=host;Port=5432;User Id=username;Password=secret;Database=databasename;

PHP documentation us here, the general connection string is host=hostname port=5432 dbname=databasename user=username password=secret

If you're using something else, you'll have to tell us.

Answer 5

• The general format of database url

DATABASE_URL=postgresql://username:password@host:port/dtabase_name

• If you are using postgresql sql with asyncpg the database url would be

DATABASE_URL=postgresql+asyncpg://username:password@host:port/dtabase_name

• Remember to never push your database password so you should use your DATABASE_URL in .env file
  
• The port is optional if you use the default one

• Like this you can connect both local and remote database think of that once you want to check an issue that occur in the remote deployed versions

• ex of localhost DATABASE_URL would be

DATABASE_URL=postgresql+asyncpg://postgres:dina@localhost/mysens

• If you deployed your database on Heroku and you want to connect it with your local app, go to Heroku Postgres installed add-on go to settings and click on view credential in Database Credentials and use the uri to connect to your database

DATABASE_URL=postgresql+asyncpg://sqnalxxxxxxxxx:160xxxx2bdd2942b26c93c392xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@ec2-35-173-91-114.compute-1.amazonaws.com:5432/del6o4cjoqfsov

Answer 6

the connection url for postgres syntax:

"Server=host ipaddress;Port=5432;Database=dbname;User Id=userid;Password=password;

example:

"Server=192.168.1.163;Port=5432;Database=postgres;User Id=postgres;Password=root;

Answer 7

The connection string can also be retrieved programmatically from working DB connectors.

For instance I sometimes extract connection strings from SQLAlchemy's engine, like this:

> db_engine.url
postgres://{user}:{password}@{host}:{port}/{db_name}?sslmode=require

Answer 8

server.address=10.20.20.10
server.port=8080
database.user=username
database.password=password
spring.datasource.url=jdbc:postgresql://${server.address}/${server.port}?user=${database.user}&password=${database.password}

Answer 9

To add more: if you want to find out the values for the url,, in pgAdmin panel

Answer 10

Some people seem to misread the database name as a server name and the host as a postgresql server? A host hosts a postgresql server that has a database. Or am I missing something.

postgresql://my_host/&server=my_postgresql_server?user=my_user&port=my_port&password=my_password&database=my_database

Example:

my_host: can be "localhost" (but that is not in the question) or an ip address of a host.

postgresql://my_host/&server=postgres?user=postgres&port=5432&password=postgres&database=test_db

Worked for me in Python with sqlalchemy and a postgresql localhost running. Needs sqlalchemy, postgresql, and psycopg2 to get it to work.

PS: The question is about a postgres://... URL, but this would not work here. Instead, you need postgresql, and what is run in the end in Python is dialect+driver (see Database URLs) = postgresql+psycopg2, without having to write it like this.

Answer 11

I found the password could not be entered in the url, but was prompted for it.

For example:

psql postgresql://the_username@localhost:5433/postgres

And then I'm prompted for the password.

Answer 12

This method is also available for Localhost in Postgresql and is supported by Postgresql.

Host=localhost;Port=your_port;Password=your_postgresql_password;User Id=postgres;database=your_database_name

Most likely your Port here is 5432

Answer 13

You Don't need connection string just follow this function it will work

  Future operation() async {
try{
final connection = PostgreSQLConnection(
  'host', // Replace with your database host
  port, // Replace with your database port
  'db name', // Replace with your database name
  username: 'username', // Replace with your username
  password: 'password', // Replace with your password
);
await connection.open();
print("Connected");
}catch(e){

  print("Error= $e");
}

}