In the relational database, data are stored in:
A.Table
B.Index
C.View
D.Transaction
A.Table
B.Index
C.View
D.Transaction
A、À quelle heure est-ce que tu vas à l'Université.
B、Quelle date sommes-nous?
C、Quelle heure est-il?
D、Qeul jour sommes-nous?
A. Public enemies
B. Pirates
C. Robbers
D. The enemies of the state to which the merchants belong
A、Select, Project
B、Cartesian-Product, Project
C、Cartesian-Product, Select, Project
D、Cartesian-Product, Select
A、Select, Project, Cartesian-Product
B、Union, Project, Cartesian-Product
C、Select, Rename, Cartesian-Product
D、Set difference, Project, Cartesian-Product
A、There is no order on the rows.
B、There is no order on the columns.
C、Two tuples can be identical in all column values.
D、Multi-valued attributes are not permitted.
A、Entity integrity
B、Referential integrity
C、Check constraint
D、User defined constraint
A、DBMS
B、Database
C、Database application
D、Data Schema
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