README.md

Commands:

1. Connect to database and open CLI: sqlite3 aquarium.db
2. See available commands: .help
3. Quit with: .quit
4. Open sqlite3 without connecting to database: sqlite3
5. Connect to database after starting sqlite3: .open FILENAME
6. See connected databases: .databases
7. See tables in database: .tables
8. See the command used to create the table: .schema TABLE
9. See indexes: .indexes
10. Execute some SQL statements:
    - select * from animals;
    - select * from animals where tank_number = 1;
    - select species, count(*) as count from animals group by species order by count desc limit 1
    - select distinct species from animals order by species asc