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Is a documentation technique.
B. Needs data volume and processing frequencies to determine the size of the database.
C. Involves modelling independent of the DBMS
D. Is designing the relational model.
Is no need for primary key data
B. Is much more data independence than some other database models
C. Are explicit relationships among records
D. Are tables with many dimensions
B. A relation.
C. A tuple.
D. An attribute.
It is an integrated collection of logically related records.
B. It consolidates separate files into a common pool of data records.
C. Data stored in a database is independent of the application programs using it
D. All of the above
B. Print files on paper
C. Data entry.
D. Delete files.
B. Relational model.
D. Sub schema.
B. Separate files
D. Database administrator
B. Data record.
Is the entire database.
B. describe data in terms of relational tables and columns, object-oriented classes, and XML tags.
C. Describes how data is actually stored on disk.
D. Both (A) and (C)
¬ P1 ∨ P2
B. P1 ∨ P2
C. P1 ∧ P2
D. P1 ∧ ¬P2