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Tutor profile: Robert M.

Inactive
Robert M.
Systems Librarian with a Background in Reference Services and Information Literacy
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Questions

Subject: Web Development

TutorMe
Question:

I keep getting a bunch of blank or incomplete form submissions on my new web form. Why is this? I have accounted for everything on the front-end that would prevent submitting without filling out all the fields.

Inactive
Robert M.
Answer:

Have you conducted browser interoperability testing? The safeguards used to ensure form completion and data validation are typically are programmed using JavaScript. There are some browsers that do not interpret JavaScript, which means that the safeguards are not used. It is not wise to rely on front-end programming to prevent this. You will need to do some programming on the back-end to catch these submissions and kick the user back out to the form with messaging to indicate the problem.

Subject: SQL Programming

TutorMe
Question:

I am trying to figure out how to speed up a simple query that only requires joining two tables, but seems to be taking forever. I only need to select values from one table and use the other table to filter. I think it is going slow because the table being filtered is pretty large.

Inactive
Robert M.
Answer:

The solution for this is pretty simple. Typically we think we need to join all our tables together for queries, but this is not always the case. In this situation, you can do a semi-join. As the name implies, it is not really a true join. Rather you use a sub-query within the where clause to create your filter. This will improve the performance of the query.

Subject: Library and Information Science

TutorMe
Question:

How do I know if a source is legitimate or authoritative when conducting research.

Inactive
Robert M.
Answer:

Acceptable sources usually come in the form of peer-reviewed journals or books. The more citations a resource includes the better. Also, the frequency with which a source is cited is also a good indicator. As far as sources residing on the Internet, most websites with the domain '.edu', '.gov', and '.org' are considered legitimate. Though, '.org' domains should be scrutinized to a degree depending on whether the subject matter is controversial and consists of main opinions as content.

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