CREATE TABLE training_sessions (
    id CHAR(36) PRIMARY KEY,
    title VARCHAR(255) NOT NULL,
    description TEXT NOT NULL,
    date DATE NOT NULL,
    time TIME NOT NULL,
    location VARCHAR(500) NOT NULL,
    capacity INT NOT NULL,
    registered_count INT DEFAULT 0,
    created_by CHAR(36) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    INDEX idx_date (date),
    INDEX idx_created_by (created_by)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;