Which command is used to modify a schema?

Which of the following commands is used for schema modification in SQL?

DDL Commands DDL stands for Data Definition Language. It consists of the SQL commands that can be used to define the database schema. It deals with descriptions of the database schema. These commands are used for creating, modifying, and dropping the structure of database objects.

What is schema modification?

A schema change is an alteration made to a collection of logical structures (or schema objects) in a database. Schema changes are generally made using structured query language (SQL) and are typically implemented during maintenance windows.

Which command is used to modify an existing database object?

ALTER: It is used to modify an existing database object like a table.

Which command is used to modify data in a database table?

1. ALTER Command : ALTER is an SQL command used in Relational DBMS and is a Data Definition Language (DDL) statement. ALTER can be used to update the table's structure in the database (like add, delete, drop indexes, columns, and constraints, modify the attributes of the tables in the database).