Which of the following is not a component of a typical schema matching system? (A) Combiner (B) Matchers (C) Classifier (D) Constraint enforcer
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Which of the following is not a component of a typical schema matching system?
(A) Combiner
(B) Matchers
(C) Classifier
(D) Constraint enforcer
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- A three-schema design has three levels, and at each level, requests are turned into results.The following are the objectives for the design of the logical schema:An aggregation relationship in the domain model suggests the application of the Question options: creator pattern singleton pattern controller pattern expert pattern
- 142. The objects in database description is called a. concept construct b. entity construct c. schema construct d. attribution constructIntroduction to database systems Question: Create an ER diagram relational schema and queries of a charity donation application that has classes as follows: Donor(name, address, mobile number, email) with subclasses: DonateMoney(name, amount, card number,security code) and DonateOther(item, name, address, mobile number, email), Volunteer(name, address, mobile number, email) and Organization(name, address, mobile number, email). The description of the application is as follows: the user can either donate money or donate other such as food, clothes,books, etc where he/she will have to first select the organization he/she is willing to donate to and then fill in the required information. The user could also volunteer by selecting what organization he/she wants to volunteer to and filling in the required information.Review: Entity-Relationship (ER) "crow-feet symbol" О Опе-to-manпy: one sale person can Salesperson have many Serves Мапy-to-many customers Entity-Relationship (ER) Diagram for a Customer Places Customer Order Database urayram Tor a customer order database Includes Line Specifies Orders Product items Development of ER diagrams helps ensure that the logical structure of application programs is consistent with the data relationships in the Generates One-to-one relationship Invoice database. © 2013-2019 Cengage learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password-protected website for classroom use. TBC: Instructions: Draw One integrated ER diagram on slide # 28 to show the relationships of the below tables Each 'student-profile' has many 'student- financials' 1. 2. Each 'student-profile' can take many 'student-courses' 3. Each…