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Labs

Query This Cassandra Database on Linux

In this activity you are working as a Systems Administrator and have been tasked with querying an existing Cassandra database.

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Lab Info
Level
Beginner
Last updated
Aug 30, 2025
Duration
15m

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Table of Contents
  1. Challenge

    Connect to the Database and Create a New Keyspace

    Note: The version of Cassandra has been updated to 3.11.8.

    Start the Cassandra Query Language shell:

    /home/cloud_user/apache-cassandra-3.11.8/bin/cqlsh
    

    Create a new keyspace named demo with a SimpleStrategy replication and 1 node:

    CREATE KEYSPACE demo WITH replication = {'class':'SimpleStrategy', 'replication_factor' : 1};
    

    Note This replication configuration is for demonstration only and is not recommended for production use.

  2. Challenge

    Create a Table

    Create a table named users in the demo keyspace:

    USE demo;
    
    CREATE TABLE users (ID int PRIMARY KEY, Name text, Department text, ExpenseCode int);
    
    DESCRIBE users;
    
  3. Challenge

    Insert Some Data
    INSERT INTO users (ID, Name, Department, ExpenseCode) values (0, 'David', 'Engineering', 200);
    

    then

    INSERT INTO users (ID, Name, Department, ExpenseCode) values (1, 'Clay', 'HR', 100);
    

    then

    INSERT INTO users (ID, Name, Department, ExpenseCode) values (2, 'Sue', 'Sales', 300);
    

    then

    INSERT INTO users (ID, Name, Department, ExpenseCode) values (3, 'Betty', 'Marketing', 400);
    

    once you have inserted the above information, run a query to see the data entered into the table with SELECT * from users;

  4. Challenge

    Query the Data

    Query the database and print only the name and department for all users:

    SELECT Name, Department from users;
    
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