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Which database level is closest to the users?
External database level is closest to the users.
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Object-based Models: Use objects as key data representation components . Examples:- Entity-Relationship Model: It is a collection of real world objects known as entitie
For Colorado customers calculate the number of single products ordered. If a product is purchased on multiple orders, it should be counted only single time. The result should conta
Explain DML with some examples? DML - Data Manipulation Language: statements used for managing data within schema objects. Some examples: • SELECT - retrieve data from the a da
What is DML compiler? DML Compiler: Translates DML statements in a query language within low level instructions understandable through the query evaluation engine. Attempts to
Define the basic operations of the relational algebra? Ans: Basic operators of relational algebra are: 1. Union (∪) - Selects tuples which are in either P or Q or in bot
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Normal 0 false false false EN-US X-NONE X-NONE
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
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