Description: ALTER TABLE is an SQL command used to modify the structure of an existing table in a relational database. This command allows various operations, such as adding, deleting, or modifying columns, as well as changing the data type of a column or setting constraints. The flexibility offered by ALTER TABLE is fundamental for database management, as it allows adaptation to changes in data requirements without the need to create a new table. This command is part of the Data Definition Language (DDL) in SQL, which is responsible for defining and modifying the structure of databases. Its use is essential in the maintenance and evolution of databases, allowing administrators and developers to make necessary adjustments to optimize performance and data integrity.
