Only for experiementd people I need to fix MYSQL QUERIES code i made you can use chat gpt to solve it .

Its some pretty serious queries i made its a project that is intedted to display available slots for the next two weeks so people can book workshop and have a booking system that creat event to the teachers . I can't make it to work and hide the right time sltos when its full or calculate the lenght of the timeslots properly , the databse is in mysql and i am ruing everything on a local machine so i can't send codes or anything realted to the porject since i want to learn and respond to your questions in real time using text or voice or visio . You can use gpt i have an account if you need to .