In relationship (Teacher teaches section). Where do you place foreign key when mapping ER Diagram to schema Select one: O a. In table section O b. In table Teacher O c. In a separate table O d. On relationship
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A: A primary key is unique key which can't be null. There can be only one primary key in one table.…
Q: Based on this ER diagram, write a complete relational schema.
A: Here the relationship between professor and office is one to one. Thus we can include primary key of…
Q: Create relational schemas for the ER diagram given below. Indicate clearly the primary and foreign…
A: The answer is
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A: Justification for given MCQ is below.
Q: Create relational schemas for the ER diagram given below. Indicate clearly the primary and foreign…
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Q: Convert the Entity Relationship diagram to a Relational Data Model.
A: Convert the Entity Relationship diagram to a Relational Data Model
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Q: Create relational schemas for the ER diagram given below. Indicate clearly the primary and foreign…
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A: employee is the relation and the remaining will be the attributes and relationship
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Q: Mapping: Create relational schemas for the ER diagram given below. Indicate clearly the primary and…
A: The relational schema has been given in step 2.
Q: Mapping: Create relational schemas for the ER diagram given below. Indicate clearly the prin and…
A: Q
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A:
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Q: Transform the ER Diagram given above into Relational Schemas.
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Q: 32. In a relational model, relations are termed as a. Tuples b. Attributes c. Rows d. Tables
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A: a) Maya Media owner plans to build a Java program which uses an input file for storing the…
Q: a) Maya Media owner plans to build a Java program which uses an input file for storing the…
A: a) Maya Media owner plans to build a Java program which uses an input file for storing the…
Q: Can the answer be done as a diagram and not the code behind the creating of the tables but the…
A: A diagram is a pictorial representation of the system that is useful to understand the attributes,…
Q: Give examples of relationships (tables) with several candidate keys.
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A: Introduction :Given ,E-R diagram , Two statements are given related to this ER diagram , we have to…
Q: In relationship (Teacher teaches section). Where do you place foreign key when mapping ER Diagram to…
A: Answer :-- c) in table Teacher
Q: Consider the following E-R diagram: E1 R'12 R12 M M R22 E2 R23 ЕЗ Which of the following statements…
A: Introduction: We have given an ER diagram as shown in the posted question. Two statements are given…
Q: Provide instances of relations (tables) that may have many candidate keys.
A: The term "candidate key" refers to a single key or a collection of several keys that uniquely…
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A: Answer is : option A A parent table will hold the primary key where as in child…
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A: Q: Answer the given questions
Q: A. For each table, identify the primary key and the foreign key(s). If a table does not have a…
A: Hey there, I am authorised to answer 1st 3 part of the question at a time when there are multiple…
Q: Transform the above ER diagram into Relational Schemas
A: The given is an Entity Relationship (ER) diagram that shows: Entities, attributes and…
Q: An entity student has a derived attribute "age". When mapping ER Diagram to schema, you place…
A: We have an entity 'student' has a derived attribute "age". When mapping ER Diagram to schema, where…
Q: 15- Consider the following Entitiy Relationship diagram. Which of the following relation will not…
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Q: A primary key is combined with a foreign key creates
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Q: Exercise 3.17 Consider the ER diagram that you designed for the Prescriptions-R-X chain of…
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- Which of the following are true about primary keys? SELECT ALL THAT APPLY. A) They must reference one or more columns in a single table. B) They are usually implemented using an index. C) They guarantee that no two rows in a table have duplicate primary key values. D) They must be defined for every database table.10. The minimal set of super key is called a. Primary key b. Secondary key c. Candidate key d. Foreign keyExplain this code detail by detail like putting comments private void table_update() { int CC; try { // It is for SOMETHING ETC.*** Class.forName("com.mysql.jdbc.Driver"); con1 = DriverManager.getConnection("jdbc:mysql://localhost/linda","root",""); insert = con1.prepareStatement("SELECT * FROM record"); ResultSet Rs = insert.executeQuery(); ResultSetMetaData RSMD = Rs.getMetaData(); CC = RSMD.getColumnCount(); DefaultTableModel DFT = (DefaultTableModel) jTable1.getModel(); DFT.setRowCount(0); while (Rs.next()) { Vector v2 = new Vector(); for (int ii = 1; ii <= CC; ii++) { v2.add(Rs.getString("id")); v2.add(Rs.getString("name")); v2.add(Rs.getString("mobile")); v2.add(Rs.getString("course")); }…
- Create an application which can access a database. Create a database with an application user, user specific for your application to use, and 1 table of a couple of fields properly indexed. Grant permissions for the user to access the table. (submit .SQL file) Create a simple application, language of your choice, (BE languages only, no JS or Node) which can do the following operations: (submit source code file): Connect using the application user created above. Insert into the table, and select from the table using a WHERE clause, where all fields are parameterized. Display results of the select. Use a simple web server API interface for data input and output, which can be accessed via local browser or curl.Below is a schema for an HR database:employee(empid, fname, lname, managerid, departmentid, employee_rank)It's an employee table, which has employee id, first name, last name, manager id (which is an employee id), department id, and employee_rank, such as VP, CEO, SVP, etc.Using SQL, answer this question (write a SQL query that answers this question) [tip: use a recursive query]. 10. For employee 42, find the path-of-managers directly to the CEO?What distinguishes a primary key from a candidate key or a superkey?
- List minimal cover and identify all possible candidate keys. A → BC IG → B C → DE ED → GJF HD → C AG → J AD → F DEC → GAssume a university database's student table has indexes on StudentID (the main key) and Major, Age, MaritalStatus, and HomeZipCode (all secondary keys) (all secondary keys). Imagine the university requested a list of students majoring in MIS or computer science who were over the age of 25, married, and from the 45462 zip code OR students majoring in computer engineering who were single and from the 45462 zip code. How can indexes be used to restrict results to to those records that fulfill this condition?Explain in detail the syntax and functionalities of the following Mongoose code: x.findOneAndUpdate({"clientID": req.query.clientid}, {"status": req.query.status}, {new: true}, function (err, data){ /* statement block */ });
- 22. The primary key is selected from the: a. composite keys b. determinants c. candidate keys d. foreign keysCreate table Medicine (MInventory_Id int primary key, M_Name varchar (40), Manufacturer varchar (40), Price varchar (20), Quantity int, Exp_Date date); Create table PrescriptionMedicine (Prescription_Id int primary key, MInventory_Id int); Example of a table (Medicine) Insert into Medicine values(101, ‘Biaxin’, ‘Pfizers’, ‘$10.99’, 1, 10/5/02); Insert into MedicineHow is a composite key different than a single key? a) It can be referenced by a forign key b) It cannot contain null values c) It is made of multiple columns c) It contains only unique values