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Discuss the problem of Spurious tuples and how we may prevent it.
Ans: A spurious tuple is, mainly, a record in a database that gets created while two tables are joined badly. In database-ese, spurious tuples are formed while two tables are joined on attributes which are neither primary keys nor foreign keys. To prevent spurious tuples, avoid joining relations that consist of matching attributes that are not (foreign key, primary key) combinations as joining on such attributes may generate spurious tuples.
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
Give an example of multiple inheritance. One example of multiple inheritance is a committee for students affair which include faculty and administrative staff member.
Define Network DBMS The NDBMS is built primarily on a one-to-many relationship, but where a parent-child representation between the data items cannot be ensured. This may occur
coventions for displaying an ER schema as ER diagram
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Gyan Gurukul is a software company that provides software related solution. Ashutosh Dubey who is the director of Gyan Gurukul want a three-level schema architecture for the Gyan G
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
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