Command to update column with the same columns value with different criteria

Hi, probably a simple command but I am trying to update a column that has a certain location with the values of that same column for a different location and I am unsure as to how it would work. Both fields are in the same table. Using Pervasive SQL v13

Ex:

Table - Items

ItemName Location QTY

Part1   Loc1   99

Part1   Loc2   2

With that example I would want to update the QTY field for all part1s for loc1 to instead have the QTY of part1 for loc2, so in the end it would be...

Table - Items

ItemName Location QTY

Part1   Loc1   2

Part1   Loc2   2

Thanks!