Move values from one column to other in Oracle table

I have around 100,000 re开发者_Go百科cords in my Oracle table.

TableMaster
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TabID
Column1
Column2

How do I update all the records so that Column1 values are moved to Column2, and Column2 values are moved to column1?

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Would this work?

UPDATE TableMaster SET Column1 = Column2, Column2 = Column1

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Modify the table, changing the column names.