What does the INSERT command accomplish in a database?

The INSERT command is fundamental in SQL (Structured Query Language) and is specifically designed to add new data rows into an existing table within a database. When this command is executed, it allows you to provide values for the columns of the table, effectively creating new entries. This is critical for populating a database with information that can later be queried, analyzed, or manipulated.

For example, if you have a table named "Employees" and you want to add a new employee's information, you would use the INSERT command to provide the necessary details, such as the employee's name, position, and hire date. Once the command is executed successfully, this new row becomes part of the table, and it can be accessed in subsequent queries.

The other options refer to different actions within a database. Adding a new database to the server is unrelated to the INSERT command, as that involves creating a new database altogether. Modifying existing data pertains to the UPDATE command, which changes current records rather than adding new ones. Defining the structure of a new table is achieved using the CREATE TABLE command, which sets up the framework for data storage, rather than inserting data.