I appropriate all your kindly advises.your ideas were helpful to understand what to do with my data .So you changed some data then immediately deleted those records that you have just updated.
Does it not occur to you that at least one of those actions is completely unnecessary?
Just in case you had not noticed, a lot of people were giving you advice on what you should be doing, and you have ignored pretty much everyone.
Think about why you were given that advice as I suspect you won't get a lot more...
Since I am new in Access , i have not enough knowledge as you experts.
I am really thankful for your always fast and perfect help.