Add SQL exercise file for 23 October 2025 #23

	name: SQL CI (MySQL)

	on:
	push:
	pull_request:

	jobs:
	test-sql:
	runs-on: ubuntu-latest

	services:
	mysql:
	image: mysql:8
	env:
	MYSQL_ROOT_PASSWORD: rootpw
	ports:
	- 3306:3306
	options: >-
	--health-cmd="mysqladmin ping -h 127.0.0.1 -prootpw \|\| exit 1"
	--health-interval=5s
	--health-timeout=3s
	--health-retries=60

	steps:
	- uses: actions/checkout@v4

	- name: Install MySQL client
	run: \|
	sudo apt-get update
	sudo apt-get install -y mysql-client
	chmod +x tests/run_tests.sh

	- name: Run SQL snapshot tests
	env:
	DB_HOST: 127.0.0.1
	DB_PORT: 3306
	DB_USER: root
	DB_PASS: rootpw
	DB_NAME: testdb
	run: ./tests/run_tests.sh

	- name: Upload outputs on failure
	if: failure()
	uses: actions/upload-artifact@v4
	with:
	name: sql-test-outputs
	path: tests/out/*.csv

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