Relation Schema in Database

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Consider the following relation schema pertaining to a student's database: Student (Rollno, name, address) Enroll (Rollno, courseno, coursename) Where the primary keys are shown underlined. The number of tuples in the student and Enroll tables are 120 and 6 , respectively. What are the maximum and minimum number of tuples that can be present in (student * Enroll) Where '*' denotes natural join? (A) 6,6 (B) 6,120 (C) 120,6 (D) 120,120 | Numerade

2021年7月9日

numerade.com

SOLVED: The use of composite attributes is avoided in relation schema when the relation schema conforms to â€“ (a) 1NF (b) BCNF (c) 3NF (d) 4NF

2022年9月24日

numerade.com

SOLVED: Q1:Find superkeys, candidate keys, primary keys, alternative keys in the following CAR relation schema?CAR (State, Reg#, SerialNo, Model, Year)Find superkeys, candidate keys, primary keys, alternative keys in the following relation?B Hh Mm #E 10 20 30 30 10101 200 50 60 70DIO D3O D9O DS3 D66

2022年1月25日

numerade.com

Consider the relational database schema of Figure 5.5. Suppose that all the relations were created by (and hence are owned by) user X, who wants to grant the following privileges to user accounts A, B, C, D, and E: a. Account A can retrieve or modify any relation except dependent and can grant any of these privileges to other users. b. Account B can retrieve aU the attributes of employee and department except for salary, mgrssn, and mg rstartdate. c. Account C can retrieve or modify WORKSON but

2020年6月19日

numerade.com

2:15

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2021年7月12日

egghead.io

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8 个月之前

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0:07

‼️RELATION TOXIQUE LE SCHÉMA ‼️ Tu te demandes pourquoi tu retombes toujours dans des relations toxiques ? Ce n’est pas ta faute, mais le résultat de blessures émotionnelles non guéries. Voici pourquoi cela arrive souvent : 👉🏽Schémas répétitifs: On répète souvent inconsciemment ce qu’on a vu et vécu dans le passé. 👉🏽Faible estime de soi: Penser qu’on ne mérite pas mieux nous pousse à accepter l’inacceptable. 👉🏽Peur de la solitude: La peur d’être seul peut nous faire accepter des relations

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FacebookMon Coaching Transition

Consider the following relations for an order-processing application database at ABC, Inc. ORDER (O#, Odate, Cust#, Totalamount) ORDER-ITEM(O#, I#, Qtyordered, Totalprice, Discount%) Assume that each item has a different discount. The TotalPRICE refers to one item, OOATE is the date on which the order was placed, and the TotalAMOUNT is the amount of the order. If we apply a natural join on the relations ORDER-ITEM and ORDER in this database, what does the resulting relation schema look like? Wha

2020年6月19日

numerade.com

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