[Yugabyte Ruby Driver for YCQL](https://github.com/yugabyte/cassandra-ruby-driver) is based on [DataStax Ruby Driver](https://github.com/datastax/ruby-driver) with additional [smart driver](../../smart-drivers-ycql/) features.
{{< note title="YugabyteDB Aeon" >}}
To use the driver's partition-aware load balancing feature in a YugabyteDB Aeon cluster, applications must be deployed in a VPC that has been peered with the cluster VPC so that they have access to all nodes in the cluster. For more information, refer to [Using YCQL drivers with YugabyteDB Aeon](../../smart-drivers-ycql/#using-ycql-drivers-with-yugabytedb-aeon).
{{< /note >}}
## Install the YugabyteDB Ruby Driver for YCQL
To install the [YugabyteDB Ruby Driver for YCQL](https://github.com/yugabyte/cassandra-ruby-driver), run the following `gem install` command:
```sh
$ gem install yugabyte-ycql-driver
```
## Create a sample Ruby application
Create a file `yb-ycql-helloworld.rb` and copy the following content to it.
```ruby
require 'ycql'
# Create the cluster connection, connects to localhost by default.
cluster = Cassandra.cluster
session = cluster.connect()
# Create the keyspace.
session.execute('CREATE KEYSPACE IF NOT EXISTS ybdemo;')
puts "Created keyspace ybdemo"
# Create the table.
session.execute(
"""
CREATE TABLE IF NOT EXISTS ybdemo.employee (id int PRIMARY KEY,
name varchar,
age int,
language varchar);
""")
puts "Created table employee"
# Insert a row.
session.execute(
"""
INSERT INTO ybdemo.employee (id, name, age, language)
VALUES (1, 'John', 35, 'Ruby');
""")
puts "Inserted (id, name, age, language) = (1, 'John', 35, 'Ruby')"
# Query the row.
rows = session.execute('SELECT name, age, language FROM ybdemo.employee WHERE id = 1;')
rows.each do |row|
puts "Query returned: %s %s %s" % [ row['name'], row['age'], row['language'] ]
end
# Close the connection.
cluster.close()
```
## Run the application
To use the application, run the following command:
```sh
$ ruby yb-cql-helloworld.rb
```
You should see the following output.
```output
Created keyspace ybdemo
Created table employee
Inserted (id, name, age, language) = (1, 'John', 35, 'Ruby')
Query returned: John 35 Ruby
```