Chapter 3 Lab Exercise 1: Drawing E-R DiagramsDrawing tool software such as SmartDraw, Dia, Microsoft Visio or similar products should be used for this laboratory exercise. If these are not available, the drawing tool in Microsoft Word or the Windows Paint program may be used. Using a drawing tool, draw an E-R diagram for the Employee-Project-Departmentexample described here:1. Consider the entity set Employeewith attributes empId, socSecNo, empName, jobtitle, and salarya. Show how the entity set and its attributes would be represented on an E-R diagram.c. Identify all candidate keys for the entity set.d. Identify a primary key for the entity set and underline it on the E-R diagram.2. a. Assume in the same enterprise as in question 1, that there is an entity set called Projectwith attributes projName, startDate, endDate, and budget. Show how this entity set and its relationship to Employeewould be represented on the E-R diagram. Assume you want to represent the number of hours an employee is assigned to work on a project, and show that in the diagram.b. Stating any necessary assumptions, make a decision about the cardinality and participation constraints of the relationship, and add appropriate symbols to the E-R diagram.c. Assume there is another entity called Departmentto be added. Each employee works for only one department. Projects are not directly sponsored by a department. Making up attributes as needed, add this entity and appropriate relationship(s) to the diagram.Chapter 3 Lab Exercise 3: Drawing E-R DiagramsDrawing tool software such as SmartDraw, Dia, Microsoft Visio or similar products should be used for this laboratory exercise. If these are not available, the drawing tool in Microsoft Word or the Windows Paint program may be used. Using a drawing tool, draw an E-R diagram for the Horse Racing schema shown in Figure 3.14 of the textbook. Explore the creation of entities, weak entities, attributes, and relationships, as well as the specification of cardinality constraints, keys, and partial vs. total relationships.Chapter 3 Lab Exercise 4: Drawing EER DiagramsDrawing tool software such as SmartDraw, Dia, Microsoft Visio or similar products should be used for this laboratory exercise. If these are not available, the drawing tool in Microsoft Word or the Windows Paint program may be used. Using a drawing tool, draw an EER diagram for the Horse Racingschema shown in Figure 3.23 of the textbook. Besides the creation of entities, attributes, and relationships, pay particular attention to the creation of total vs. partial subclasses, disjoint and overlapping specifications on subclasses, multiple inheritance, and the category specification.Chapter 3 Lab Exercise 2: Drawing an EE-R DiagramUsing drawing tool software such as Visio, SmartDraw, or the drawing tool in Word, draw an EER diagram for the example described below(a) Starting with the E-R diagram you created in Lab Exercise 1, assume the entity set Employeesis specialized into Clerical, Sales, and Management. Add symbols to the current E-R diagram, showing how the specialization is represented on an EE-R diagram, making up attributes as needed, and stating any assumptions you need to make. b. For the specialization in Part (a) add relationships that show:(i) All employees can have a pension plan(ii) Sales employees have clients(iii) Management employees have projectsc. Using (min,max) notation, add constraints for the relationships, stating any additional assumptions you need to make.（以上发布均为题目，为保证客户隐私，源代码绝不外泄！！）代写计算机编程类/金融/高数/论文/英文本网站支持淘宝 支付宝 微信支付 paypal等等交易。如果不放心可以用淘宝或者Upwork交易！E-mail:[email protected]微信：BadGeniuscs 工作时间：无休息工作日-早上8点到凌晨3点如果您用的手机请先保存二维码到手机里面，识别图中二维码。如果用电脑，直接掏出手机果断扫描。