What are DML commands?

DML or Data Modification Language commands are used in creating, updating or deleting data from the database objects such as tables.

These are:

  • INSERT INTO TABLE <table_name>
  • UPDATE <table_name> SET <column_name>=<new_value>
  • DELETE [ <column_name> | * ] FROM <table_name>

What are DDL commands?

DDL or Data Definition Language commands are used in defining or manipulating database schema. These are used for creating, modifying, and dropping the structure of database objects such as tables.

These are:

  • CREATE TABLE | DATABASE <object_name>
  • ALTER TABLE <table_name>
  • DROP TABLE | DATABASE <object_name>

Docker for Beginners – Composing and Building a Dockerfile

A Dockerfile is a configuration file which describes the docker runtime on how to build a customized image from an existing base image and how to get things started. It is useful in building exportable containers for applications which can later be used in creating and deploying containerized nodes.

Docker for Beginners – Basic Commands to Get Started

To get started in the world of docker way of application deployment, we require to get ourselves familiar with a few commands which do jobs like starting, running and terminating a "container" along with commands which help in monitoring the containers and executing commands over them.