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Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
What is Index? An index is a physical structure having pointers to the data. Indices are created in an existing table to locate rows more quickly and efficiently. It is possibl
Every School has many teachers and many students. Each student is assigned to one school and each teacher works for one school only. Each teacher teaches more than one subject but
How external/conceptual mapping and conceptual /internal mapping is performed
what is data link layer
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
WOUND-WAIT
Question A What is operational intelligence? Question B What is Business Intelligence? Explain the components of BI architecture Question C Differentiate between databas
What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
What is relationship instance ? Relationship Instance - A relationship is a relation between two or more entities. An instance of relationship set is a set of relationships.
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