How can i convert below DataFrame array to string

[Suresh Ayyavoo]

Hi All,

How can i convert below DataFrame [accountID: array<string>, completed_at:
array<string>, created_at: array<string>] to
[accountID: string, completed_at: string, created_at: string]

root

 |-- accountID: array (nullable = true)

 |    |-- element: string (containsNull = true)

 |-- completed_at: array (nullable = true)

 |    |-- element: string (containsNull = true)

 |-- created_at: array (nullable = true)

 |    |-- element: string (containsNull = true)


root
|-- accountID: string (containsNull =true)
|-- completed_at: string (containsNull =true)
|--create_at : string (containsNull =true)


Thanks