Cassandra DB Commands You Need to Know (YouTube Guide)

As a senior PHP, JS web developer, mastering Cassandra DB commands is crucial for efficient database management. Below are essential commands that will help you navigate and manipulate data in Cassandra:

Data Definition Language (DDL) Commands

• CREATE KEYSPACE: Creates a new keyspace in Cassandra.
• CREATE TABLE: Defines a new table in a keyspace.
• ALTER TABLE: Modifies an existing table definition.
• DROP KEYSPACE: Deletes a keyspace and all its tables.
• DROP TABLE: Removes a table from a keyspace.

Data Manipulation Language (DML) Commands

• INSERT: Adds a new row to a table.
• UPDATE: Modifies existing data in a table.
• DELETE: Removes data from a table.
• SELECT: Retrieves data from one or more tables.

Key CQL Commands

• DESCRIBE KEYSPACES: Lists all keyspaces in the cluster.
• DESCRIBE TABLES: Displays all tables in a keyspace.
• DESCRIBE KEYSPACE: Provides details about a specific keyspace.
• DESCRIBE TABLE: Shows the structure of a specific table.

Clustering and Indexing Commands

• CREATE INDEX: Creates a new index on a column.
• ALTER INDEX: Modifies an existing index.
• DROP INDEX: Removes an index from a table.
• CLUSTERING ORDER BY: Defines the clustering order of a table.

Batching and Transactions Commands

• BEGIN BATCH: Starts a batch of CQL statements.
• APPLY BATCH: Executes a batch of CQL statements.
• UNLOGGED BATCH: Performs a batch operation without logging.
• LOGGED BATCH: Logs batch operations for atomicity.

By mastering these Cassandra DB commands, you can effectively manage your database and perform various operations with ease. Whether you are new to Cassandra or looking to enhance your skills, these commands will help you navigate the complexities of Cassandra databases.