update: task2_3_4_selects.sql

create: client_manager_logical_guide.md

create: client_manager_line_by_line_guide.md, lecture_db_design_python_postgresql.md, client_manager.py

init

update: create.sql

create: music_service_schema.sql, task1_inserts.sql, task2_3_4_selects.sql

update: music_service_schema.sql

create: Схема связей офис.png, улучшенная таблица для музыкального сервиса.png, employee_schema.sql, music_service_schema.sql

first_commit