从SQL w / PHP发送和接收复选框数据

I am trying to figure out the SQL code that I would need to pass an array of checkbox data to sql, and then pull the same array back out of sql for a form afterwards. I received some help from a friend on how to save the data into an array, but do not know the best practice to pull the array from SQL in the form of checkbox data.I am trying to figure out the SQL code that I w