Lookup with multiple criteria

If we have to look up items in tables where we can’t use unique identifiers (there are no names located in a table column that contains data in all of the rows, and that data is non-repeating), we will probably have to resort to matching multiple criteria in multiple columns.   Consider the following example: Each year, multiple game tournaments are held in repeating cities, organized by various repeating organizers. Items in the column City are not unique, nor are

EOMONTH function: calculate past or future date from the starting date

You will sometimes need to calculate one date based on another date. Most often, you will need the first or last date of the current month, the first or last date of the current year, the previous or future month, year, quarter dates, etc. No matter what kind of dates you need, the simplest way to generate them will include the EOMONTH function.   The EOMONTH function returns the last day of the month in relation to the start date.

Date and Time in Excel

How are date and time stored and formatted? No matter how date and/or time are formatted and possibly edited, the underlying values saved in cells are still decimal numbers. Given that Excel’s era starts on January 1, 1900, if we enter number 1 in the cell and format it as a date, the date we will see is in fact January 1, 1900.Zero will provide for a nonexistent date of January 0, 1900, and a negative number will result in