Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator
and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
![$\pi [\sigma_{\text{student's nam}e} [ \sigma(\text{three courses}) \Join \text{"Philosophy"}]]$](https://tex.z-dn.net/?f=%24%5Cpi%20%5B%5Csigma_%7B%5Ctext%7Bstudent%27s%20nam%7De%7D%20%5B%20%5Csigma%28%5Ctext%7Bthree%20courses%7D%29%20%5CJoin%20%5Ctext%7B%22Philosophy%22%7D%5D%5D%24)
<u>Answer</u>:
<u>EXAMPLES:</u>
Primary domain name could be “bestwebdesigner.com,”
subdomain to that domain called “blog.bestwebdesigner.com.”
<u>Explanation</u>:
Essentially, a subdomain is a separate part of your website that operates under the same primary domain name.
Any time you pass an argument to a method, the data type arguments must be assignment compatible with data type receiving parameter.
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Answer: Informal bench-marking
Explanation:
Informal bench-marking is defined as unconscious comparison of one's own behavior, skills, values etc with other and learning from them to improve. This leaning can be found in work-place, home, school etc.
- According to the question, Myles is using informal bench-marking through studying other stores complaint handling style and reduction technique so that he can learn from it.
- Other options are incorrect because designing analysis,outcome analysis, issue analysis and processing of complaining ta re not the comparison that unconsciously done by person .
- Thus, the correct option is informal bench- marking.