Learn CQL with Real Code Examples

Updated Nov 18, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Installation Setup

Install Apache Cassandra (standalone or cluster)

Install cqlsh command-line shell

Configure cluster and keyspaces

Set up authentication, SSL, and roles

Environment Setup

Install Apache Cassandra

Start Cassandra service

Connect via cqlsh or driver

Set up authentication and TLS if required

Config Files

cassandra.yaml

cqlshrc

keyspace and table definitions

Schema migration scripts

Cli Commands

cqlsh

DESCRIBE KEYSPACES/TABLES

SELECT, INSERT, UPDATE, DELETE statements

CONSISTENCY LEVEL specification

Internationalization

Store UTF-8 strings

Support multi-language fields

Use proper collation for sorting

Locale-aware queries if needed

Accessibility

Clear table and column naming

Consistent schema across clusters

Document API contracts for developers

Provide indexes for critical queries

Ui Styling

Not applicable directly

Visualization via DataStax Studio or BI tools

Front-end integration via APIs

Custom dashboards for analytics

State Management

Row-level atomic updates

Use TTL for temporal data state

Conditional updates via LWT

Cluster-wide consistency tuning

Data Management

CRUD via CQL

Partitioning and clustering for large datasets

Indexing for query performance

Backup and restore via nodetool or snapshot