-- 检查growth_record表的时长相关字段
SELECT 
    id,
    order_id,
    student_id,
    record_date,
    start_time,
    end_time,
    duration,
    service_duration,
    TIMESTAMPDIFF(MINUTE, start_time, end_time) as calculated_duration_minutes,
    content,
    create_time
FROM growth_record
WHERE teacher_id = 1
ORDER BY record_date DESC
LIMIT 10;

-- 查看表结构
DESCRIBE growth_record;