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column family
A column family is a NoSQL object that contains columns of related data. It is a tuple (pair) that consists of a key-value pair, where the key is mapped to a value that is a set of columns. In analogy with relational databases, a column family is as a "table", each key-value pair being a "row". Each column is a tuple (triplet) consisting of a column name, a value, and a timestamp. In a relational database table, this data would be grouped together within a table with other non-related data.
Two types of column families exist:
*Standard column family: contains only columns
*Super column family: contains a map of super columns
==See also==
*Keyspace (NoSQL)
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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