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sql is relationally complete-justify
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
Key to represent relationship amongs tables is called ? A Key that represent the relationship between tables is called Foreign Key.
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
2NF Normal Form : A relation schema process R is in 2NF if it is in 1NF and each non-prime attribute A in R is fully functionally related on primary key. Second normal form (2N
What are the categories of SQL command? SQL commands are separated in to the following categories: 1. Data - Definitition Language 2. Data Manipulation language 3. Dat
Write the syntax of creating an INDEX ? Syntax of Creating an Index: CREATE [BITMAP] [UNIQUE] INDEX ON ( [, ] . . .);
What is meant by data-transfer rate? The data-transfer rate is the rate at which data can be retrieved from or kept to the disk.
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
Determine the Derived attribute to avoid re-computation Each class box consists of an ordered list of attributes and operations, each represented as a next string. We can find
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