DATABASE FUNDAMENTALS
BASICS OF BIG DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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We can delete a column family with ____
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drop
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alter
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delete
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disable
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Explanation:
Detailed explanation-1: -Alter is the command used to make changes to an existing table. Using this command, you can change the maximum number of cells of a column family, set and delete table scope operators, and delete a column family from a table.
Detailed explanation-2: -You can delete a column family from a table using the method deleteColumn() of HBAseAdmin class.
Detailed explanation-3: -A column family cannot be renamed. The common approach to rename a family is to create a new family with the desired name and copy the data over, using the API. Reference Hbase-The Definitve Guide.
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