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What is a SELECT operation? The select operation selects tuples that please a given predicate. We use the lowercase letter σ to denote selection.
What are aggregate functions? And list the aggregate functions supported by SQL? Aggregate functions are functions that take a collection of values as input and return a one va
Describe association design of an object by giving one suitable example of it. The Design of Associations Associations are "glue" of advanced object oriented analysis and
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
System error :These contain errors in database system or the OS, example, deadlocks.Such errors are fairly hard to detect and need reprogramming the erroneous components of the sys
what is file organization? what are file organization techniques.explain in detail? explain random file organization technique, multikey file organization technique?what is indexin
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
(a) Provide the description of the following ODMG schema in the Object Definition Language (ODL). (b) Based on the above object database, write the following queries i
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
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