Get count of foreign key from multiple tables

Question

I have 3 tables, with Table B & C referencing Table A via Foreign Key. I want to write a query in PostgreSQL to get all ids from A and also their total occurrences from

Answer 1

Another option:

SELECT
    a.id,
    (SELECT COUNT(*) FROM b WHERE b.a_id = a.id) +
    (SELECT COUNT(*) FROM c WHERE c.a_id = a.id)
FROM
    a