DDL means “Data Definition Language.” It is a part of SQL used to define and change the structure of a database, such as creating tables, changing columns, or deleting objects.
In real life, people use DDL when they are setting up or updating a database. For example, a developer might use it to create a new table for customer records, add a new field, or remove an old table that is no longer needed.
Meaning & Usage
DDL is used to manage the structure of a database, not the data inside it. Common DDL commands include CREATE, ALTER, DROP, and TRUNCATE.
Examples
A simple example is creating a table for employees. Another example is adding a new column for email addresses. These are both DDL actions because they change the database design.
What is DDL used for?
DDL is used to create, change, or remove database structures like tables, indexes, and schemas.
Is DDL the same as SQL?
DDL is a part of SQL. SQL is the full language, and DDL is one group of commands within it.
What are common DDL commands?
The most common DDL commands are CREATE, ALTER, DROP, and TRUNCATE.
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