Student(Stud_Id, name, addr, sex, DOB, country , major) Lecturer(Lect_id, name, sex, department, tel_no) Course(Course_code, description, credit_hr, department) Registration(Stud_id, course_code, room_no, lect_id, time) Write the correct relational algebra for the following queries:  Display student id, name and sex for all male students from the country of ‘Singapore’. Display student id, name, and major for all students that majoring in ‘CS’ or ‘ENG’. Display detail registration listing for courses that have more than 3 credit hours. Display student name and course description for all students taking courses offered by ‘IS’ department.

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Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.