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Construct a generalization-specialization hierarchy for a motor-vehicle sales company. The company sells motorcycles that comprise an engine number and cost; cars that have a chassis number, an engine number, seating capacity and cost; trucks that have chassis number, an engine number and cost.
What is DDL? Make a list of commands with short description used in DDL Ans: Data Definition Language that is abbreviated as DDL is a computer language for defining data struct
what is correlation in nested query
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
Explain Network Model in DBMS? Network Model - It was formalised within the late year of 1960s through the Database Task Group of the Conference on Data System Language (DBTG
How do I begin
1. Explain different addressing modes of 8086 Explanation of all addressing modes 2. Write a sequence of instructions to exchange two register contents using stack
What is data definition language? Explain it in detail? The SQL DDL allows specification of not only a set of relations, but also information after each relation, containing
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
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