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Explain CNT in the respects of QBE ? CNT: It is one of the aggregation commands given in QBE. It is used to identify number of tuples
write an SQL statement to create the database in MYSQL server
A database is to be constructed to remain track of the teams and games of a sport league. A team has a number of players, not all of whom participate in every game. It is desired
how to data store?
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
what is physical data structure
Drawbacks of Database systems ?
Define the Canonical cover Ans: A canonical cover F c for F is a set of dependencies like F logically implies all dependencies in F c , and F c logically entails all dependen
what is the relationship between receipt and owner entities in computer sales and service company
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
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