Could you assist in designing a structured database system for managing information on substation components? This would include recording maintenance activities, purchase years, nameplate details, and for transformers, categorizing maintenance needs and lifespan projections. Additionally, could you create a flowchart illustrating the database creation process and provide detailed instructions for building the database schema and queries? Please respond only if you have a solid understanding and practical experience in this area. You can use mysql or any other free places