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Database Management SystemConsider: * Student(SID, Name, Dept, Age) * Course(CID, CName, Faculty) * Enroll(SID, CID, Marks) 1. Write relational algebra expressions to find: * a) Students enrolled in DBMS * b) Students scoring >80 marks * c) Students not enrolled in any course 2. Write SQL queries: * a) Find highest marks * b) Find average marks department-wise * c) Display students enrolled in more than two courses 3. Translate the following query into tuple relational calculus: * "Find names of students from CSE department." 4. Convert the following relational algebra into SQL: * \pi_{Name}(\sigma_{Marks > 85}(Student \bowtie Enroll))202510mDatabase Management SystemExplain the select, project, join and division with the help of example.20187mDatabase Management SystemConsider the following schema for institute library: Student (RollNo, Name, Father_Name, Branch) Book (ISBN, Title, Author, Publisher) Issue (RollNo, ISBN, Date-of-Issue) Write the following queries in SQL and relational algebra: (i) List roll number and name of all students of the branch 'CSE'. (ii) Find the name of student who has issued a book published by 'ABC' publisher. (iii) List title of all books and their authors issued to a student 'RAM'. (iv) List title of all books issued on or before December 1, 2020. (v) List all books published by publisher 'ABC'20247mData MiningA university plans to build a data warehouse that would help them in analyzing the performance of the students in various courses in different academic sessions. They want to analyze if there is any relation between the average grade of a course and the number of students attending it. They would also like to know if there were some courses offered but did not have any students registered for them. Relative performance among boys and girls and average grades of students from various States and cities of the country for each course must be analyzed and also overall CGPA. Design a star schema for such a data warehouse clearly identifying the fact table(s) and dimension table(s), their primary key(s) and foreign key(s). Your schema should at least be able to satisfy the above-mentioned analysis requirements. You may consider other suitable attributes for the dimension table(s).202110m
PreviousThe relational algebra expression \pi_A(R) - \pi_A((\pi_A(R) \times S) - R) is equivalent to: (i) Selection (ii) Join (iii) Division (iv) ProjectionNextA relation is in BCNF if: (i) Every non-prime attribute depends on key (ii) Every FD is trivial (iii) Every determinant is a superkey (iv) Every attribute is atomic