What is difference between FieldDefs vs Fields? When to use it?

What is difference between FieldDefs vs Fields? When to use it?
Thank you very much.

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  1. Tuan Hoang Anh I'm guessing here, but isn't that Fields editor just a FieldDefs editor in disguise?

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  2. FieldDefs for creating a table. Fields for accessing (designtime if you use persistant fields) info on actual fields or (runtime) info after you used Open (or Prepared in some cases). Donät know specifically about FDMemeTable though. Maybe this helps: http://docwiki.embarcadero.com/Libraries/Berlin/en/Datasnap.DBClient.TCustomClientDataSet.CreateDataSet
    docwiki.embarcadero.com - Datasnap.DBClient.TCustomClientDataSet.CreateDataSet - RAD Studio API Documentation

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