Retrieve values from 2 tables given a value in a third map/join table

Question

I have a table for lawyers:

CREATE TABLE lawyers (
  id SERIAL PRIMARY KEY,
  name VARCHAR,
  name_url VARCHAR,
  pic_url VARCHAR(200)
);

Imagine the whole table looks like this:

And a table for firms:

CREATE TABLE firms (
  id SERIAL PRIMARY KEY,
  name VARCHAR,
  address JSONb
);

Whole table:

Then to map many to many relationship I'm using a map table lawyers_firms:

CREATE TABLE lawyers_firms (
  lawyer_id INTEGER,
  firm_id INTEGER
 );

I'm not sure how to retrieve values from lawyersand from firmsgiven a lawyers_firms.firm_id.

For example:

1. SELECT name, name_url and pic_url FROM lawyers. 
2. also SELECT name and address FROM firms.
3. WHERE `lawyers_firms.firm_id` = 1.

Answer 1

Try this:

SELECT l.name, l.name_url, l.pic_url, f.name, f.address 
FROM lawyers l
 inner join lawyers_firms lf
 on lf.lawyer_id = l.id 
 inner join firms f
 on f.id = lf.firm_id
 WHERE lf.firm_id = 1;