To check if the values are in another column in Excel, you can apply the following formula to deal with this job.
1. First, you can copy the two columns of data and paste them into column A and Column C separately in a new worksheet, leave Column B blank to put the following formula.
2. Enter this formula: =IF(ISERROR(VLOOKUP(A2,$C$2:$C$11, 1, FALSE)),FALSE,TRUE ) into cell B2, and press Enter key, see screenshot:
Tips: in the above formula, A2 is the cell of the first column that you want to check if it is in another column, and $C$1:$C$11is the column that you want to be compared with.
3. Then select cell B2, and drag the fill handle over to the cells that you need to apply this formula, you will get the following result, TRUE stands for the value in Column A exists in Column C as well, and FALSE indicates the value is not in Column C.
Source: https://www.extendoffice.com/documents/excel/3040-excel-check-if-value-is-in-another-column.html
