CS457C_DRILL_ SANDEEP ANUGULA_10805

CS457C_DRILL_ SANDEEP ANUGULA_10805 - CS457C DRILL...

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CS457C DRILL EXEMPTION NAME: SANDEEP REDDY ANUGULA STUDENT ID: 10805 SECTION: CS457C 1. What is the "language" people "talk" to the relational database like Oracle? A. Structured Query Language (SQL). Example: SELECT Syntax: SELECT * FROM TABLENAME; 2. What are the benefits of using Entity Relationship Model in the database design? A. Entity Relationship Model: The ER model uses graphic representation of entities and their relationships in a database structure where the entity is mapped to a relational table. Below we have the following benefits, which are used for Entity Relationship Model in the database design Exceptional conceptual simplicity Visual representation Effective communication tool Integrated with the relational data model. 3. What is the primary key? A. Primary Key of a table uniquely identifies each record in the table. A primary key can be a normal attribute, which is unique, or Data Base Management System (DBMS) can generate it and it will have more than one attribute.
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