defines data types and the relationships among them ........

General Science (CHSL) Computers

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.............defines data types and the relationships among them.

Data definition language

Data manipulation language

Query language

OQL

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Explanation:

A data definition or data description language (DDL) is a syntax similar to a computer programming language for defining data structures, especially database schemas. DDL statements create and modify database objects such as tables, indexes, and users. Common DDL statements are CREATE , ALTER , and DROP .