A relation schema defines the structure of the table from "summary" of SQL and Relational Theory by C. Date

The concept of a relation schema is crucial in understanding the structure of a table in a relational database. A relation schema essentially defines the blueprint or template for a table, specifying the names of the attributes or columns that make up the table, as well as the data types and constraints associated with each attribute. By defining the structure of the table in a relation schema, we establish the framework within which data will be stored and manipulated. This structure ensures that all data entered into the table adheres to the specified format and constraints, maintaining the integrity and consistency of the database....

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SQL and Relational Theory

C. Date

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