Indices can speed up query processing, but indexing every characteristic, and every combination of attributes, that could be used as a search key is typically a bad idea. What makes you think that?

When using subtype associations, it's vital to talk about the different database table alternatives. Choose a design and talk about the issues that will develop as a result of it. Computer science

What happens if the referential integrity of your database is not upheld? What mistakes are more likely to happen?

An index is an orderly arrangement used to logically access rows in a table. From a conceptual point of view, an index is composed of an index key and a set of pointers. In your opinion, explain the role indexes play in a relational database.

What happens if a database loses referential integrity? Your most prevalent mistakes?

What would happen if a database's referential integrity was compromised? What are the most common mistakes you make?

Question  A city college would like to maintain their academic information in a MySql database system.  The following are the interested information: Courses: Catalog # (M170 for instance) Credit Hours; Name of the Course (Database Design Fundamentals for instance) Course Descriptions Prerequisite Components (Lecture, or Laboratory for instance) Classes: Class # Class Name (usually the course name, M 170 for instance) Start Date End Date Meeting time (9:30 am ~ 12:15 pm, for instance) Days in a week (Monday) Term (Spring 2018, for instance) Location (TIE Building for instance) Room (UB 301, for instance) Instructor Online status (online, or in-person) Faculty: Employee Id (001880301, for instance) First Name Last Name Title (professor, for instance) Email Phone Office Location (TIE building, for instance) Room (UB303, for instance) Student: Student ID First Name Last Name Plan Sub Plan Advisor Current GPA Grade of each course The Term you got the grade for a course. The class…

In a relational database, the number of columns in a table that are able to satisfy the constraints that have been defined may be decreased by the use of an operation called select. Which is it: the right answer or the erroneous answer?

In a relational database, the number of columns in a table that are able to satisfy the constraints that have been defined may be decreased by the use of an operation called select.Which is it: the right answer or the erroneous answer?

Why is it not desirable to force users to make an explicit choice of a queryprocessing strategy? Are there cases in which it is desirable for users tobe aware of the costs of competing query-processing strategies? Explain your answer.