What the heck is EventSourcing & CQRS ? SQL tables

db_artists.md

id	name
1111	The Beatles

db_performance_claims.md

id	user_id	recording_id	performance
7171	2222	3131	‘singer’

operations.sql

INSERT INTO artists VALUES name=’Beatles’, id=1111;
UPDATE artists SET name=’The Beatles’ WHERE id=1111;
INSERT INTO performance_claims VALUES user_id=2222, performance=’singer’, id=7171, recording_id=3131;