There is one map and one dataset in my account. The dataset is synced to a Google Sheet to which my students add data.

All the layers of the map are derived from the one synced dataset. One of the layers is an animated timeline. The timeline worked fine before syncing, but now that it is synced, the data type of the "date" column is set as "string", and I'm not able to change it.

I found this answer on Stack Exchange, but the solution it refers to is a bit beyond my SQL ability (setting up a dynamic query I could probably manage, but the linked was reference to dates in Postgres is opaque to me at this point.): How do you change the data type of a column for a synced table?

Is there a way to maintain a "date" data format in a synced table?

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    – PolyGeo
    Commented Jan 30, 2018 at 23:54

1 Answer 1


You can use the SQL panel of your layer to convert the string into a date column, something like

       to_date(my_field, 'DD Mon YYYY') as field_date 
  FROM my_table

Where my_field in this case looks like 05 Dec 2000, for example. You have full documentation on how to_date works at Postgres documentation.

  • can you clarify, if I use the SQL panel to create a date field on my synced data, as shown, will the new field be visible from CARTO-JS or only from within builder?
    – JMers
    Commented Sep 12, 2018 at 1:10
  • 1
    only from BUILDER, if you want to use CARTO.JS then you write the exact same SQL clause on your JavaScript code.
    – Jorge Sanz
    Commented Sep 13, 2018 at 7:03
  • please remember to mark the answer as complete when you agree, so we can remove this one from the queue, thanks!
    – Jorge Sanz
    Commented Sep 13, 2018 at 9:41

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