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Define- relational algebra.
The relational algebra is a procedural query language. It having of a set of operations that take one or two relation as input and make a new relation as output.
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
Retrieve the S&S In-Chapter Database (in Microsoft Access format) from the text's Web site (or create the tables in Table 4-5 in a relational DBMS product). Write queries to answer
Why is need for the multiple access paths?
What does Aggregation mean?
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
Security And Integrity After Reading the concepts of database recovery in the last section, let us now deal with a vital concept that helps in minimizing consistency errors in
a publishing company produce scientific books on various subjects. the books are written by authors who specialize in one particular subject. the company employs editors who, not n
losers with new information systems
What is self-transition? If there is a transition which goes back to same state, it is known as "self- transition." With a trigger action exit action would be executed f
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