Computers and Technology, 16.11.2020 18:00 queeneaf
Given the following tables: students(sid, name, age, gpa) courses(cid, deptid, name) professors(ssn, name, address, phone, deptid) enrollment(sid, cid, section, grade, foreign key (sid) references students, foreign key (cid) references courses foreign key (cid, section) references teaches) . teaches(cid, section, ssn foreign key (cid) references courses foreign key (ssn) references professors) Domain » cid is in '198:11','640:151','198:112',...^ . deptid is in ['cs','math','music',.. . grade is in ['A','B','C,... » section, age, ssn are an integers » address, phone, name are strings » gpa is float Provide SQL instructions for each of the following questions 1. Create the database schema. 2. Find the name of professors that work for the cs department. 3. Find those students (sid) enrolled in courses in the cs department 4. List ssn and name of professors that work for the cs department, but are not teaching any cs courses 5. List the number of courses offered by each department. Just the number of courses (not sections) 6. List of those departments that offer more than 10 courses 7. Produce a list of the name of those students whose professor's name starts with an M. Your result must have no duplicates
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Given a link with a maximum transmission rate of 32.8 mbps. only two computers, x and y, wish to transmit starting at time t = 0 seconds. computer x sends filex (4 mib) and computer y sends filey (244 kib), both starting at time t = 0. statistical multiplexing is used, with details as follows packet payload size = 1000 bytes packet header size = 24 bytes (overhead) ignore processing and queueing delays assume partial packets (packets consisting of less than 1000 bytes of data) are padded so that they are the same size as full packets. assume continuous alternating-packet transmission. computer x gets the transmission medium first. at what time (t = ? ) would filey finish transmitting? give answer in milliseconds, without units, and round to one decimal places (e.g. for an answer of 0.013777 seconds you would enter "13.8" without the quotes)
Answers: 3
Given the following tables: students(sid, name, age, gpa) courses(cid, deptid, name) professors(ssn,...
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