Moving data from one Excel workboook to another, by matching common column fields as primary key in both workbooks

I Have two excel workbooks with many sheets, one of the workbooks is to map the data (all the keys and data structures we use) and the other workbook is a data dictionary to get the DataFeed key which is what need to populate in the first workbook. both workbooks have a common attribute (SNL key) in all the sheets in the workbooks but they aren't on the same sheets. Can I set up a primary key (SNL key) to join the workbooks together and populate the empty DataFeed key in the first workbook. at the moment im going through it one by one and there has to be a more efficient way of doing this.