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How to create values of structured type?
Constructor functions are used to make values of structured types. A function with the similar name as a structured type is a constructor function for the structured type.
The State of Newyork certifies firefighters throughout state keep track all of them, as well as the state’s of fire departments. Each fire department has unique department number
Use the IRIS dataset that comes with Weka to compare the classification performance of the following algorithms. 1. NaiveBayesSimple 2. MultiLayerPerceptron J48 (
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
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
What is equi join? Equi Join - It generates all the combinations of tuples from two relations which satisfy a join condition along with only equality comparison (=).
Explain several types of constraints that can be specified using CREATE TABLE command. Explain CASCADE and RESTRICT clauses of DROP SCHEMA command? Constraint Description PRIM
difference between internal schema and external schema in DBMS
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
Example: RELATIONAL SCHEMA for PERSON: PERSON (PERSON_ID: integer, NAME: string, AGE: integer, ADDRESS: String) RELATION INSTANCE In this instance, m = 3 and n = 4
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