If you want to change or relabel the column header, you can do this two ways:

1. Via the steps element:

• Head to the add new step element on the left-hand side of your query builder and click columns. Then click rename columns.

• A new step called Rename will be added to your list of steps. Click the + symbol.
• Select the column you want to rename from the list and type the new column name in the box. If you want to rename more, just click + and repeat.
• Done!

2. Via the column header: