Excel subtotals, formulas and functions
Validity of the data: Toolbar - data validation
Many practical problems of data have practical significance, its value is a certain limit, when using Excel to pay attention to the validity of the data!
In the data validation tool bar where you can set the validation criteria, you can also set an error warning.
Data validation is triggered when editing input!
Excel Help :( Chinese) https://support.office.com/zh-cn/excel
In Formulas question:
Relative references: a row of pull-up or
Absolute references: a fixed value when the cell used in the formula to use
Mixed references: about the same time the drop-down, for example, when using the multiplication tables
Part of Excel formulas:
Vital logical judgment IF: COUNTIF (), COUNTIF (), SSUMIF (), SUMIFS ()
Note: Cell dislocation problem! ! !
Hurry, only coarse pan made a note, follow up on detailed operation!