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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.

Lab Info
Table of Contents
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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.
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Challenge
Create a Table
Create a table named
users
in thedemo
keyspace:USE demo;
CREATE TABLE users (ID int PRIMARY KEY, Name text, Department text, ExpenseCode int);
DESCRIBE users;
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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;
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Challenge
Query the Data
Query the database and print only the
name
anddepartment
for all users:SELECT Name, Department from users;
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