How to Check for Duplicates Before Inserting Into SQL. When you insert new records into an SQL database, you may run into issues where you accidentally overwrite records that are already present ...

To check the data set for duplicate records, select all of the columns in Power Query. To do so, hold down the Shift key while you click each column. Then, choose Keep Duplicates from the Keep ...

I'm fairly certain what you want to be using is DTS. It the wizard interface lives under Import/Export data. IMO, It's one of the best tools that has ever been designed for the computer.

How to label duplicates in Power Query. We don’t want to remove the duplicates. Instead, we want to label them in some way. We’ll add a new column that identifies duplicates in some way.