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The Dataframe API was released as an abstraction on top of the RDD, followed by the Dataset API. In Spark 1.x, the RDD was the primary application programming interface (API), but as of Spark 2.x use of the Dataset API is encouraged [3] even though the RDD API is not deprecated. [4] [5] The RDD technology still underlies the Dataset API. [6] [7]
However, if data is a DataFrame, then data['a'] returns all values in the column(s) named a. To avoid this ambiguity, Pandas supports the syntax data.loc['a'] as an alternative way to filter using the index. Pandas also supports the syntax data.iloc[n], which always takes an integer n and returns the nth value, counting from 0. This allows a ...
Additionally there is a single-row version, UPDATE OR INSERT INTO tablename (columns) VALUES (values) [MATCHING (columns)], but the latter does not give you the option to take different actions on insert versus update (e.g. setting a new sequence value only for new rows, not for existing ones.)
In a year in which it seemed every great luminary got a moment under the documentary lens, it can be a bit difficult to parse out which were must-see. This list will have you covered.
DOHA (Reuters) -The ouster of Syrian President Bashar al-Assad, after rebel forces swept into Damascus this weekend, shattered Iran's network of influence in the Middle East but Israel, the United ...
“For a cancer cell to divide into two, it has to make a new set of cellular contents. That requires a lot of nutrients, which ultimately come from the diet. It is therefore intuitive to imagine ...
Word2vec is a technique in natural language processing (NLP) for obtaining vector representations of words. These vectors capture information about the meaning of the word based on the surrounding words.
Though Beluga whales are Arctic creatures, they are also highly migratory, coming into shallow, warmer waters down south in the winter months. They have a highly diverse diet, and will eat over a ...