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Consider the Dept1_Parts and Dept2_Parts relations shown in the exhibit. Which of the
following SQL statements would create an intersection of the two relations with the widest variety
of Structured Query Language dialects?
Suggested Answer: D
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39 comments · newest first
RO
Ronald
11 months ago
Wait, can you really use INTERSECTION in all SQL dialects? Sounds fishy.
MI
Miriam
11 months ago
Totally agree with B, it's the cleanest way to get the intersection!
CH
Cheryl
12 months ago
Not sure about option D, it looks similar to C but might not work as intended.
JI
Jimmie
12 months ago
I think option C is more straightforward for this case.
LO
Louvenia
1 year ago
Option B uses the INTERSECTION keyword, which is standard SQL.
MI
Miriam
1 year ago
I’m a bit confused about the syntax in option A. I don’t think AND is the right keyword to use there, but I can’t recall what should be used instead.
BO
Bok
1 year ago
I feel like I’ve seen a question like this before, and I think the INTERSECTION keyword is the most straightforward way to get the intersection.
BO
Bo
1 year ago
I'm not entirely sure, but I remember something about using WHERE clauses to find matches between two tables. Maybe options C and D are similar?
ST
Stephaine
1 year ago
I think option B looks familiar because it uses the INTERSECTION keyword, which we practiced in class.
TR
Trinidad
1 year ago
I'm a bit confused by the wording of the question. Does "widest variety of Structured Query Language dialects" mean the most portable solution across different database systems?
MA
Matilda
1 year ago
Okay, I've got this! The WHERE clause to match the Part_ID columns is the way to go for the widest SQL dialect support.
GO
Golda
1 year ago
Hmm, the intersection of the two relations is the key here. I think I'll need to explore the INTERSECTION and JOIN options to find the best solution.
DA
Dalene
1 year ago
This looks like a tricky one! I'll need to carefully review the SQL dialects supported to determine the widest variety.
BE
Bernardo
1 year ago
This is a good test of my SQL knowledge. I'll need to think through the pros and cons of each approach to determine the most versatile solution.
ED
Edgar
1 year ago
Hmm, I'm not sure if a compliance policy is the right approach for this. I'll need to double-check the requirements and see if there are any other options I should consider.
LE
Leota
1 year ago
I think respect involves listening to others, so maybe option B is the best example. It reminds me of a case study where employee input was crucial.
MY
Myong
1 year ago
I remember we did practice questions on permissions, and I think these are definitely Dangerous Permissions, but I could see how they might be confusing.
LA
Laura
1 year ago
I'm going with Option D. It's the simplest and most straightforward approach. Plus, it reminds me of that classic joke: 'Why did the SQL statement cross the road? To get to the other SIDE condition!'
CE
Celestina
1 year ago
Yeah, it adds a bit of humor to the technical discussion.
MA
Mabelle
1 year ago
Haha, that joke about the SQL statement crossing the road is funny!
OL
Olen
1 year ago
I agree, it seems like the most logical choice.
JA
Jacinta
1 year ago
I think Option D is the way to go.
FI
Fidelia
2 years ago
Option A? Really? Combining a SELECT with an AND operator? That's not valid SQL syntax, is it? Looks like a trick question to me.
RA
Rana
1 year ago
Yeah, Option B makes more sense. It's the proper way to create an intersection of two relations in SQL.
PA
Pamella
1 year ago
I think Option B is the correct answer. It uses the INTERSECTION keyword to find the common rows in both relations.
SE
Sena
1 year ago
Yeah, I agree. Option B is the right choice for creating an intersection of the two relations.
JA
Jade
1 year ago
No, Option A is definitely not valid SQL syntax. It's a trick question.
CH
Cherry
1 year ago
I think option B is the correct one. It uses the INTERSECTION keyword to find the common records.
TI
Tiffiny
2 years ago
No, option A is definitely not valid SQL syntax. It's a trick question.
FE
Fernanda
2 years ago
Hmm, I don't know. Option C looks like it might have a typo. Shouldn't it be `Dept1_Parts.Part_ID = Dept2_Parts.Part_ID` instead of the other way around?
DO
Dorothy
2 years ago
I'm not sure about that. Option D seems more portable to me. The WHERE clause with the equality comparison is a more basic SQL construct that should work across a wider range of database systems.
TH
Thersa
1 year ago
It might be more efficient, but it may not be supported by all SQL dialects. Option D is a safer choice for wider compatibility.
VA
Valentin
2 years ago
But what about Option B? Wouldn't using the INTERSECTION keyword be more efficient?
SA
Sabra
2 years ago
I agree, the WHERE clause with the equality comparison is a safer bet for compatibility.
CL
Clarence
2 years ago
Option D is definitely more portable. It's a basic SQL construct that should work on many systems.
SU
Sue
2 years ago
Option B looks like the way to go. The INTERSECTION keyword is supported by most SQL dialects, including SQL Server, Oracle, and PostgreSQL.
DI
Diane
2 years ago
Why do you think C is the correct answer?
VE
Veronique
2 years ago
I disagree, I believe the answer is C.
DI
Diane
2 years ago
I think the answer is B.