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Consider the following collection of relation schemes: instructor (ID, name, dept_name, salary) teaches (ID, course id, sec id, semester, year) Using the above relations, write
Consider the following collection of relation schemes:
instructor (ID, name, dept_name, salary)
teaches (ID, course id, sec id, semester, year)
Using the above relations, write an equivalent relational algebra expression for the following:
name (sinstructor.ID =teaches.ID (sdept_name =Physics (instructor teaches)))
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