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**Mapping** **EER** **Model** **Constructs** **to Relations** . Copyright © 2011 Ramez Elmasri and Shamkant Navathe Relational Database Design by ER- and **EER**-to-Relational **Mapping**

**Mapping** **EER** **Model** **Constructs** **to Relations**

•**Mapping** **EER** **Model** **Constructs** **to relations**. ER -> Relational **Map** Step 1 •For each entity type E in the ER schema, create a **relation** R that includes all the simple attributes of E. •Add only simple components from any composite atrributes in E.

13 **Mapping** **EER** **Model** **Constructs** **to Relations** (contd.) **Mapping** of Shared Subclasses (Multiple Inheritance) A shared subclass, such as STUDENT_ASSISTANT, is a

**Mapping** **EER** **Model** **Constructs** **to Relations**. Relational Database Design by ER- and **EER**-to-Relational **Mapping**

**Mapping** **EER** **Model** **Constructs** **to Relations** |**Mapping** of Shared Subclasses (Multiple Inheritance) A shared subclass, such as STUDENT_ASSISTANT, is a subclass of several classes, indicating multiple inheritance. These classes must all

**Mapping** **EER** **Model** **Constructs** **to Relations**

**Mapping** **EER** **Model** **Constructs** **to Relations**

7 Agenda Sets **Relations** and tables Relational schema Primary keys Relational Database Design Using ER-to-Relational **Mapping** **Mapping** **EER** **Model** **Constructs** **to Relations**

**Mapping** **EER** **Model** **Constructs** **to Relations** }Step 9: Options for **Mapping** Specialization or Generalization}Step 10: **Mapping** of Union Types (Categories) 12 2007/3/27 Introduction to Database Systems 23 Step 1: **Mapping** of Strong Entity Types

**Mapping** **EER** **Model** **Constructs** **to Relations** (cont)

**Mapping** **EER** **Model** **Constructs** **to Relations**

Seven-step algorithm to convert the basic ER **model** **constructs** into **relations** ! Additional steps for **EER** **model** SE487: ... 286 Chapter 9 Relational Database Design by ER- and **EER**-to-Relational **Mapping** 9.1 Relational Database Design Using

(**EER**) **model** extended from the traditional Entity Relationship ... one [Codd79]. The ER **model** lacked **modeling** **constructs** like specialization (or generalization) ... This **model** and its **mapping** (as per the algorithm given by Elmasri and Navathe [Elmasri04])

**Mapping** **EER** **Model** **Constructs** **to Relations**

Data **Models** Data **Model**: A set of concepts to describe the structure of a database, and certain constraints that the database should obey.

**Mapping** **EER** **Model** **Constructs** **to Relations** SQL: Schema Definition, Basic Constraints, and Queries SQL Data Definition and Data Types Specifying Basic Constraints in SQL Schema Change Statements in SQL Queries in SQL ...

TRANSFORMATION OF THE **EER** **MODEL** **TO RELATIONS** (STEP 2) 3.1 Transformation Rules 3.2 ... categorization of extended ER **constructs** and a set of **mapping** rules, ... the transformation of all types **of EER** **constructs** **to relations**.

(**EER**) **Model** 101. 4.1 Subclasses, Superclasses, and Inheritance 101 4.2 Specialization and Generalization 104 ... 7.2 **Mapping** **EER** **Model** **Constructs** **to Relations** 226 7.3 Summary 230 Review Questions 230 Exercises 231 Laboratory Exercises 232

**Mapping** **EER** **Model** **Constructs** **to Relations** . ให้นักศึกษาทำการ **Mapping** **EER** **Model** **Constructs** **to Relations** ...

... but the **EER** **constructs** and their semantics are retained, ... Abbreviation Used for Temporal Support for E-**Relations** **Mapping** of Weak Entity Types ... and the **mapping** we present resembles the **mapping** from the **EER** **model** to the relational **model** presented in [7].

7.2 **Mapping** **EER** **Model** **Constructs** **to Relations**. 7.3 Summary. Chapter 12 - Practical Database Design Methodology and Use of UML Diagrams. 12.1 The Role of Information Systems in Organizations. 12.2 The Database Design and Implementation Process.

... ER **model** **constructs** entities and its types, attributes, relationships, degree, unary, binary, ternary, n-ary, cardinalities ... Transform **EER** diagrams into **relations**, seven different steps for **mapping** **EER** **model** into **relations**. Unit-IV Introduction to normalization, steps ...

**Mapping** spatio-temporal conceptual schemas into XML Schema documents ... Relationship **model** (**EER**) with additional **constructs** for spatio-temporal information [6, 2, 3]. ... spatial **relations** which are preserved under the topological

Ordered Pairs, **Relations** & Functions Ordered Pairs, Equality of Ordered Pairs, ... Summary of **Mapping** for **Model** **Constructs** and Constraints **Mapping** **EER** **Model** Concepts **to Relations**, Query, Processing and Optimization, Query Processing, Query Optimization, Database Tuning.

Relational database design using ER -to-Relational **mapping**; **mapping** **EER** **model** **constructs** **to relations**. 7. Functional Dependencies And Norm alization For Relational Databases: Informal design guidelines for relational schemas; functional dependencies; ...

What are the important factors that need to be considered to **model** a system from different views? 5. Describe the following with respect to class diagrams: a. ... Describe the **Mapping** **of EER** **Model** **Constructs** **to Relations**. 4. Describe the following concepts with respect to file organization:

Relational Database Design Using ER-to-Relational **Mapping**, **Mapping** **EER** **Model** , **Constructs** **to Relations**. Chapter 7 - SQL-99: Schema Definition, Constraints, Queries, and Views.

Discuss the correspondences between the ER **model** **constructs** and the ... Discuss the options for **mapping** EERmodel **constructs** **to relations**. 7.3. Try to **map** the relational schema of Figure 6.12 into an ER schema. This is part of a ... **EER** diagram notation to represent subclasses and ...

of ER **constructs** into **relations** which can be normalized later. Numerous ... The connectivity of a relationship specifies the **mapping** of the associated entity ... **model**. A taxonomy **of EER** **constructs** was defined, ...

approach by Atzeni and Torlone in which the source **EER** **model** is imported ... fere with **mapping** strategies for other **EER** **constructs**. ... Several strategies for **mapping** classes **to relations** exist. For example, consider the

over UML or **EER** diagrams, which may have cross-conceptual **model** assertions. ... DL **constructs** can be re-expressed in DLR as: ∃P.C as ∃ ... **model** checking, compute derived **relations**, and classiﬁcation. Conversely, when

1. we propose a **mapping** from CGG conceptual schemas into W3C XML Schema Language schemas ... Relationship **model** (**EER**) with additional **constructs** for spatio-temporal information [4, 5, 8]. ... Since the **relations** are temporal, ...

We have selected the **EER** **model** because of its widespread use in designing relational databases [19]. ... structures using relational **constructs**. 2.1 Relational Concepts. ... The **mapping** **of EER** schema.5 into relational

determining unambiguously which **EER** **constructs** the Relational **Model** ... to a Relational **Model** Schema always results in a set of **relations** in Boyce-Codd Normal Form. You may divide the answer into two parts: consider the ER **model** and its **mapping**; then bring in the additional features of Enhanced ...

ER-to-Relational **Mapping** Algorithm, **Mapping** **EER** **Model** **Constructs** **to Relations**. 8. Disk Storage Devices, Files of Records, Operations on Files, Unordered Files, Ordered Files, Hashed Files, Types of Single-level Ordered Indexes, 9.

Fuzzy **EER** **Model**: Enhance entity ... the ExIFO **model** into the extended NF 2 **relations** including uncertain properties that are presented in ... principles and **constructs** and the ways to define the membership functions within all the **constructs** of FSM. Specification of FSM schema and a language to ...

... the temporal **EER** **model** ERV T is brieﬂy introduced. ERV T ... hZ,<i or hN,<i. Thus, a temporal database can be regarded as a **mapping** from time points in T to standard ... [7, 4]). For the temporal **constructs** we have: 2The snapshot **model** represents the same class of temporal databases as ...

Fuzzy **EER** **Model**: Enhance entity-relationship **model** ... **constructs** and the ways to define the membership functions ... It introduces a similarity **relations** based **model** to handle fuzziness at three levels: attribute level, object/class

... the concepts and **relations** must be well-typed. The **model**-theoretic semantics of DLR is speciﬁed through the ... comparing the language **constructs** of ER, **EER**, UML class diagrams, ORM, and ORM2 has become ... 30. Keet, C.M. **Mapping** the Object-Role **Modeling** language ORM2 into Description

**constructs** (entities and relationships) ... The **mapping** rules of the Chen **model** to a relational database ... The first two **relations**, MALL–Store and MALL are the same as they were in Chapter 2: **Relations** for the STORE Entity

... (OPM) is the result of incorporating **constructs** for **modeling** scientific experiments (protocols ... such as the **Extended Entity-Relationship** (**EER**) **model**, the relational **model**, and the ASN.1 data ... relational database definition entails **mapping** every OPM object or protocol class C into a ...

data structures to the **constructs** of the ER and **EER** **models**, and presents algo rithms for designing a relational database schema by **mapping** a conceptual schema in the ER or **EER** **model** ... The relational **model** represents the database as a collection of **relations**. Informally,

... . disj;cover are binary **relations** over 2EE , describing disjointness and covering partitions ... is a tree **model**, and for each U 2Uits **mapping** is a global and functional role, then there is bijective **mapping** between ... fragments of the **EER** **model** for which temporal extensions are ...

Object Role **Model** (ORM) is a data **modeling** technique ... and understandable approach for **mapping** the ORM2 **constructs** to SROIQ DL syntax. ... SROIQ still lacks the capability of **mapping** primary keys and n-ary **relations** where n > 2.

elling formalisms, **extended entity relationship** (**EER**) **model**, has proved to be a precise and ... abstraction of **constructs** that it includes. Although the original ER **model** was proposed by Chen (1976), many extensions ... the number of **relations** can participate in other **relation**-ships as in ...

ER- and **EER**-to-Relational **Mapping** Copyright © 2004 Pearson Education, Inc. Chapter 7-2 ... Example: We create the **relations** EMPLOYEE, DEPARTMENT, and ... Summary of **Mapping** **constructs** and constraints.

... composite attributes in **EER**; **relations**, classes and ... The **EER** **model** deﬁnes a primary key constraint on the SSn attribute. Therefore, a ... **constructs** and the **mapping** rules Rfor the respective metamodel.

... Barker ER, IE, and IDEF1X [27]|a new **mapping** scheme has to be identi ed, resulting in ... of type R 1 u R 2, and i n , i.e., the concepts and **relations** must be well-typed. The **model**-theoretic semantics of DLR is ... comparing the language **constructs** of ER, **EER**, UML class diagrams, ORM, and ...

include number theory, sets, **relations** and functions, logic, graphs and trees, matrices, ... Structural constraints, problems with ER **model**. **EER** **model** - specialization or generalization, aggregation and ... predícate logic and covers various Prolog programming **constructs** such as loops, ...