How can you connect to a postgresql database on heroku from google-colaboratory?

问题

Just started using colaboratory and would like to run sql queries against a postgresql db. Is this possible on colaboratory. I've used magic sql with jupyter nb to do this.

回答1:

It was a matter of using 2 %% instead of 1 that was giving me an error. What I'm running is this:

! pip install ipython-sql
! pip install psycopg2 
%sql postgres://<connect string>
%sql select tablename from pg_tables;

I saw an example where there sql was run with %%sql and when I tried that I got an error. Everything is running well now. Rebecca

来源：https://stackoverflow.com/questions/47216559/how-can-you-connect-to-a-postgresql-database-on-heroku-from-google-colaboratory