Column in the Cassandra Database

Column in Cassandra is a ternary group {Name,value,timestamp}

Name

Name is required and has two ways of generating it:

For the static column family, its value is specified by the administrator who created the column family.

For dynamic column family, its value is dynamically set by the client application.

A secondary index can be built on name (secondary index)

Value

Value is not required, such as column familiy, which is equivalent to materialized views.

Timestamp

Used to determine the most recent update to column

In the Cassandra-cli command-line tool, use the list <column family name > command to display all row and column, such as our KeyStore is demo, column family is users, When you enter the list users, you can see:

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