a) Write an expression in relational algebra that retrieves the names, surnames,and addresses of members that have borrowed all books of the author Knuth.b) Write a query in SQL that retrieves the data about the books of the authorLamport that were borrowed in the last year by more than 3 members. Print the result inthe sorted order by the author and title. Books (bid, author, title, publisher, year, notes);Members (mid, name, surname, street, city, country, phone, notes);Borrow (rid, bid, mid, date, notes);

Explanation of Relational Algebra and SQL solutions:a) Relational Algebra for finding members who…

Answered: a) Write an expression in relational…

A Guide to SQL

9th Edition

ISBN:9781111527273

Author:Philip J. Pratt

Publisher:Philip J. Pratt

Chapter4: Single-table Queries

Section: Chapter Questions

Problem 10SCG

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ITEM (ITEM ID, DESCRIPTION, ON HAND, CATEGORY, LOCATION, PRICE, NUM, INVOICE _ DATE, CUST PRICE)) (INVOICE ID, FIRST NAME, LAST_ NAME, QUANTITY, QUOTED
Define the term " relational greater than " .
Select all the staff full names with the customer full names of the consignments they have worked on. Include staff that have not worked on any consignments
Table name: Products Column Role Data Type Length Constraint Name P ID Stores the ID of a product Number 8. Primary key P Name Stores the name of a product Varchar2 25 P_entryDate Stores the entry date of a product Stores the expiry date of a product Date Cannot be null P_Expiry P Expiry date should be greater than P entryDate Date P Price Stores the price of a product Number 3,2 Cannot be null a) Write in SQL a command that creates the table Products according to the above description (2 marks). b) Write in SQL a statement that adds to the table Products a new column named supplierID of type Number(5). This column should be defined as a foreign key that relates the table Products to the table Supplier (1.5 marks). c) Write in SQL a query that lists all the details of products arranged in descending order according to the entry date (1.5 marks).
A Bank has many customers. Attribute for customer includes customer number, name, address (street, city, state and zip code), sex and date of birth. Customer can have multiple accounts. The bank does not allow join account (one account per customer). Type of account offer by the bank are Saving, Current and Fixed Deposit. Attribute for account are account no, account type, and account balance. Each of the account can only exist in a particular branch. Attribute for branch are branch no, branch name and address (street, city, state and zip code). Customer can open different account at different branch. Draw an ER diagram for the above situation. Identify the entity, attributes, primary key, relationship and multiplicity constraint in the ER diagram.
Q9) find the least expensive priceQ10) List the UNIQUE v_code of vendors that provide productsQ11) find the most expensive priceQ12) List the number of products by vendor with the average price, include only the rows withaverage price below 10.00Q13) List all vendor rows (including the ones that have no matching products) and all matchingproduct rows
Display manager ID and number of employees managed bythe manager. using sql plus hr user
7. For each project, display project name, project platform, project cost and total number of student involved. Label the columns as ProjectName, ProjectPlatform, ProjectCost and TotalStudentInvolved respectively. Order the query in ascending order by ProiectName. SQL statements:
SQL code for: (1) Hint: A NULL in the hours column should be considered as zero hours. Find the ssn, lname, and the total number of hours worked on projects for every employee whose total is less than 40 hours. Sort the result by lname */ /* (2) For every project that has more than 2 employees working on it: Find the project number, project name, number of employees working on it, and the total number of hours worked by all employees on that project. Sort the results by project number. /* (3) For every employee who has the highest salary in their department: Find the dno, ssn, lname, and salary. Sort the results by department number. */ /* (4) For every employee who does not work on any project that is located in Houston: Find the ssn and lname. Sort the results by lname /* (5) Hint: This is a DIVISION query For every employee who works on every project that is located in Stafford: Find the ssn and lname. Sort the results by lname */
- The HR department needs a report to display employee information as shown from the job_history table. The months worked is the number of months from the start date to the end date. Only list those employees whose months worked is an even number. Order by months worked descending
Find your group number• The remainder after division of second to last digit of your student id by 3 is a.• The last digit of your student id is b.• Your group number is ab, which is an integer between 0 and 29.• If your group number is equal to ab=00 then take it as ab=01.Examples:• Student Id = 290316027 → Group = 27• Student Id = 290315043 → Group = 13• Student Id = 280315061 → Group = 01• Student Id = 270316085 → Group = 25• Student Id = 290315027 → Group = 27 my student Id is 280316014 but i didnt calculate ab.Can you help me .Thank you.
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