A numerical field,I want to use today's data minus yesterday's， what should I do？
Please describe what you want in more detail.
How will the data for each day be entered into your solution?
A numerical field，I enter a daily data.Now I want to get every day minus the previous day's data。
You have not answered my request for more detail. What does this data represent?
Is each day’s data entered into a different record?
Is there a date field?
Is the data always entered, without exception in the correct order?
Are there times, such as during a holiday, where no data is entered?
An auto-enter Calculation can copy a value from the previous record into a field so that a calculation field can use that value to calculate the difference, but there are different ways to access the data from that previous day’s record assuming that you are using separate records in the first place.
Retrieving data ...