Merge columns to replace existing columns. In Query Editor, ensure that the columns that you want to merge are of Text data type. Right-click a column header, and select Change Type > Text from the context menu. Select two or more columns to be merged. Press the CTRL key, and then click on the column headers to select the columns that you want to merge.
Normally we figure out someone's age with current date subtracting the given birth date. So does it in Excel. Step 1: Enter current date in a blank cell, such as 2016/4/7 in Cell B2. Step 2: In another blank cell (says cell C2), enter the formula =INT((B2-A2)/365), and press the Enter key.
Calculate age from DOB at a particular date. If you need to convert date of birth to age at a particular date, not today's date, use the DATEDIF age formula discussed above, and replace the TODAY() function in the 2nd argument with the specific date. Assuming the date of birth is in B1, the following formula will return age as of 1 January 2020: