Make Table API users to easily leverage the powerful features in SQL, e.g. deduplication, topn, etc
Provide convenient frequently used functionalities, e.g. introducing a series of methods for null data handling (it will become a problem if there are hundreds of columns) and data sampling and splitting (it is very common in ML to split a data set into multiple splits separately for training and validation)

Public Interfaces

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Align SQL functionalities

Specification:

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