In the figure below, STUDENT relation has a composite primary key contains Stud_ID and Course_ID. This relation isSTUDENTStud IDNameCourse IDUnits101LennonMSI 2503.00101LennonMSI 4153.00125JohnsonMSI 3313.00

Answered: In the figure below, STUDENT relation…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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When both relations are not physically sorted but have an index on the attributes being combined, a hybrid merge-join method should be built.
Convert the following table to third normal form (3NF). In this table, StudentNum determines StudentName, NumCredits, AdvisorNum, and AdvisorName. Advisor Num determines AdvisorName. CourseNum determines Description. The combination of StudentNum and CourseNum determines Grade. STUDENT (StudentNum, StudentName, NumCredits, AdvisorNum, AdvisorName, CourseNum, Description, Grade). Identify the primary key for the original table and the primary keys for the resulting tables. Indicate the foreign keys with italic font. Give meaning names to the resulting tables.
A relation is a function only if any two first values in the pairs are the same. True or False
The following question is based upon the Patient-Treatment relation which records the details of transactions occurring in a medical surgery. You may assume the data are representative. PATIENT ID PATIENT NAME PATIENT DOB CONSULT DATE ITEM NUMBER ITEM DESCRIPTION FEE PROVIDER NUMBER DOCTOR NAME 437 REARDON 4/08/1989 19/7/2020 A012 Standard 56 S55768 Scott 437 REARDON 4/08/1989 20/7/2020 A012 Standard 56 D42433 Mueller 562 BILSTEIN 12/05/2001 20/7/2020 A013 Short 35 S55768 Scott 361 WILSON 13/08/1997 20/7/2020 A014 Long 75 S55768 Scott 895 LEMOS 13/10/1952 20/7/2020 A013 Short 35 D42433 Mueller 895 LEMOS 13/10/1952 20/7/2020 A014 Long 75 D42433 Mueller 678 MORT 27/02/1969 20/7/2020 A014 Long 75 S55768 Scott 432 SOAPIER 1/08/1976 21/7/2020 A012 Standard 56 S55768 Scott You have been asked to design a…
PLS HELP ME : Write expressions of relational algebra to answer the following queries Find MaMH and TenMH of all courses having SOTIET greater than 45. Find MaSV, HoSV, TenSV of all students of the department Hệ thống thông tin. (denoted department name is TenMH) Find MaKH, TenKH of all departments having no students. (denotation of departments is MaKH, , student code is denoted by MaSV) 4. Find MaMH, TenMH of all courses learned by both Lê Kim Lan and Trần Minh Chánh. (the symbol of the courses is MAKH) 5. Find the MaSV, HoSV, TenSV of student having the highest scholarship. (the symbol for the scholarship is HOCBONG) 6. Find the MaSV, HoSV, TenSV of all students participating in at least two different courses. 7. Find the MaSV, HoSV, TenSV of all students participating in one course many times.
Review the SaleItem relation below where ItemNumber plus OrderNumber is the primary key. What type of primary key does this relation have? SALEITEM (ItemNumber, OrderNumber, Quantity, Price) Group of answer choices Composite primary key Surrogate primary key Transitive primary key Alternate primary key
Using the Henry Books database,Henry Books no longer carries books written by Barbara Owen. Delete this author from the authors table. You will insert 2 snips for this question. What construct did you use to delete author Barbara Owens? Insert the snip of the construct used: Insert the snip of the authors table. Be sure all rows are displayed:
If you assume that a relation has no duplicate data, how do you know there is always at least one primary key?
Assume the EMPLOYEE table contains four attributes, ID, DEPT, SALARY and NAME, and has the following rows ID DEPT SALARY NAME 100 SALES 40000 Smith 101 RD 38000 Terry 102 HR 60000 David 103 SALES 58000 Ellie 104 RD 70000 Judy The DEPARTMENT table contains two attributes, DEPTNAME and PHONE, and has the following rows: DEPTNAME PHONE RD 8596001234 SALES 8596005555 HR 8596009876 A.) The EMPLOYEE table needs to enforce the following integrity constraints: • The ID is the primary key. • The DEPT column is a foreign key that references the DEPTNAME in the DEPARTMENT table, so that any value that appears in the DEPT column should also exist in the DEPARTMENT table. • The value for the NAME column can never be null. What should be the statement used to create the EMPLOYEE table, if 1) the table was created as a partitioned table such…
Consider the following relational schema. titles employees emp_ne NUMERICE 0) emp ne NUMERICEO) title CHARACTER VARYING) from date DATE to date DATE birth date DATE first mame CHARACTER VARYING(14 last name CHARACTER VARYING(16) gender CHARACTER) hire date DATE salaries emp ne NUMERICE0) salary NUMERIC6.0) from_date DATE te date DATE dept_manager dept_no CHARACTERIA emp no ERICISO from date DATE to date DATE departments dept ne CHARACTERIA) dept_name CHARACTER VARYINOJAO) dept_emp emp ne NUMERICS dept ne CHARACTER() from date DATE date DATE The salaries table has the primary key named emp_no. The titles table has the primary key named emp_no. • The employees table has the primary key named emp_no. The dept_manager table has the composite primary key named (dept_no, emp_no). The dept_emp table has the composite primary key named (emp_no, dept_no). The departments table has the primary key named dept_no. The salaries table has a foreign key column named emp_no that references the…
The process of decomposing a relations into two relations is called: Select one: O Denormalization O Nested relation Normalization Values in a tuple are not considered atomic. Select one: O True O False Which of the following SQL statements drop the HOAPITAL schema? Select one: O DROP SCHEMA COMPANY AUTHORIZATION "SAM"; O DROP HOAPITAL CASCADE; O DROP SCHEMA HOAPITAL CASACDE; O DROP HOAPITAL AUTHORIZATION 'Ali"; None
When you add a time property to a relation, it becomes a temporal relation. Will the useful links still work? In a time database, how is the problem solved?

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In the figure below, STUDENT relation has a composite primary key contains Stud_ID and Course_ID. This relation is STUDENT Stud ID Name Course ID Units 101 Lennon MSI 250 3.00 101 Lennon MSI 415 3.00 125 Johnson MSI 331 3.00