Which term is used for a database schema?

The term used for a database schema is "Data Structure." A database schema refers to the organizational blueprint of a database, detailing how data is organized, how the data is structured, and the relationships between different data entities. A schema defines tables, fields, data types, and the connections between these elements, all of which compose the overall data structure of the database.

This concept is foundational in database design, as a well-structured schema ensures that the database is efficient, maintains integrity, and is suited for the necessary applications. Understanding data structure is crucial for database management systems, as it enables database administrators and developers to manipulate and retrieve data effectively.

The other choices pertain to different concepts in data management. Data alignment generally refers to the arrangement of data within data processing or systems, data normalization involves organizing data to reduce redundancy, and data backup relates to making copies of data for recovery purposes, none of which encompass the definition of a schema as effectively as data structure does.