change relation property type [string to date] with apoc very large data

[Nural1O]

I have a property 13M rows, i wanna change datatype to string in one query with apoc
now neo4j considered my rows as string. what query i should write to change datatype
my rows; [ "2006-09-01" ]

[glilienfield]

Can you provide more details on what the current data is and what you want it to be?