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Tutor profile: Manny D.

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Manny D.
Software Engineer
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Questions

Subject: SQL Programming

TutorMe
Question:

What is the difference between a UNION statement and a JOIN statement?

Inactive
Manny D.
Answer:

A UNION statement will return the result of two queries based on their own unique where clauses (select * from a where value=1 UNION select * from b where value=2) and a JOIN statement will return the data from two or more tables based on a matching identifier (select * from a join b on a.id = b.id)

Subject: Python Programming

TutorMe
Question:

In Python, what is the difference between '==' and the keyword 'is' in a conditional statement?

Inactive
Manny D.
Answer:

'==' compares the actual value and operands of values being compared, while 'is' determines whether the operands refer to the same object in memory.

Subject: HTML Programming

TutorMe
Question:

In traditional HTML programming, which HTML tag attributes are used to reference HTML tags in a CSS file?

Inactive
Manny D.
Answer:

Classes and IDs. Classes relate to multiple similarly styled HTML tags. IDs relate to a single element to be styled in a particular way.

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