Hi All, I am trying to add double quotes around the column type that are of string type in spark dataframe, how can I do that   for eg   Initial DF col1    |   col2    | col3 1        |    abc     | px01   After adding the quotes to the alphanumeric data ie to the string type columns the final dataframe should be   col1    |   col2       |  col3 1        |    "abc"     | "px01"   ... View more