Script for google sheets

I'll explain what I need. I have a folder in google drive with many google spreadsheets files inside. Every file is shared with a specific user and is named with a code associated at that user. Example: file 123456 is shared with user 123456. Furthermore, on my website there is a Mysql table called "all_orders" that collect every order related to al the users. Example: user |orderNumber |sku 123456 |1 |as1254 789456 |2 |pt4587 321654 |3 |pt5698 321654 |3 |pt8574 .... xxxxxx |n |yyyyyy I want that a script job is scheduled (every hours) and do this: Execute a query for every xxxxxx user like: SELECT * FROM all_orders WHERE user="xxxxxx" Insert the result of the query in the google sheet xxxxxx under the sheet "orders", deleting the data previously written. I don't know which is the best way to do this, I hope in your help. This is a sample only , the column are more and the query little more complex with more condition. So I need to access the code easily to personalize the code. Anyway this is the juice. The code must not be accessible from user with in the files is shared in.