How to stop data that is grouped together from being saved by using commas in a database

I am trying to save data from a project into a database which requires me to have 3 separate fields for Month Day and Year. I need it to be separated with slashes but Thunkable automatically changes it into commas. Is there a code which can make this save with / in between the values.
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Don’t use a list block. That makes a list which contains commas as delimiters. Instead, use the join block from the Text drawer.

Or you can use the list block make text from list and set the delimiter to nothing (“”).