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Consider the Stu_Act and Act_Fee tables shown in the exhibit. Which relational algebraic
operation would yield the Activity Relation table in the exhibit?
Suggested Answer: B
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37 comments · newest first
KR
Kris
10 months ago
Wait, are we sure about that? Looks tricky!
AN
Angelo
11 months ago
I agree, natural join makes the most sense here.
ME
Mendy
11 months ago
Union seems like a good choice too.
MA
Maybelle
11 months ago
Definitely not a Cartesian product!
ME
Merlyn
11 months ago
I think it's a natural join.
VI
Viola
11 months ago
I recall something about intersection, but it doesn't seem like that's what we're looking for in this case.
HE
Herminia
12 months ago
I feel like the activity relation table is showing a combination of attributes, so maybe it's a Cartesian product?
SI
Simona
12 months ago
I'm not entirely sure, but I remember practicing a question where union was used. This feels different though.
SH
Shawnta
12 months ago
I think we might need to use a natural join here since we're combining related data from both tables.
ST
Stephaine
1 year ago
I think the natural join operation is the way to go here. The tables have a common attribute (Activity_ID), and the desired output looks like it's combining the information from both tables. I'm pretty confident in this approach, but I'll still double-check my work before submitting the answer.
RI
Rima
1 year ago
I'm feeling a bit lost on this one. The tables and the desired output are clear, but I'm struggling to remember the specific relational algebra operations and how they work. I'll need to review my notes and examples to try and figure this out.
JU
Julieta
1 year ago
Okay, let's see here. The question is asking for the relational algebra operation that would yield the Activity Relation table. Based on the information provided, I'm leaning towards the natural join operation. But I'll double-check my work to be sure.
CR
Cristy
1 year ago
Hmm, I'm a bit unsure about this one. The tables seem simple enough, but I'm not entirely sure which relational algebra operation would give me the desired result. I'll need to think this through carefully.
EV
Eveline
1 year ago
This looks like a straightforward relational algebra question. I think the key is to carefully examine the tables and the desired output to determine the appropriate operation.
DE
Denny
1 year ago
I've got a good feeling about this one. Based on the information provided, I think a natural join is the way to go. The tables seem to be related by the Activity ID, so that should give us the desired result.
MA
Margurite
1 year ago
Okay, let's see here. The key is to identify the relationship between the two tables and the desired output. I think a natural join might be the way to go, but I'll double-check the definitions of the other operations just to be sure.
CY
Cyril
1 year ago
Hmm, I'm a bit unsure about this one. The tables seem simple enough, but I'm not entirely confident in my understanding of the different relational algebra operations. I'll have to think it through step-by-step.
GL
Glenn
1 year ago
This looks like a pretty straightforward relational algebra question. I'm going to carefully review the tables and think through the different operations to determine which one would yield the desired result.
PE
Pearly
1 year ago
The natural join is the way to go. It's like a secret handshake between the tables, making sure they only share the relevant information. Very clever, this one!
RA
Raylene
1 year ago
User 3: Making sure they only share the relevant information.
MA
Margarita
1 year ago
User 2: Yeah, it's like a secret handshake between the tables.
MA
Margurite
1 year ago
User 1: I think the natural join is the best option.
TR
Trinidad
1 year ago
Ah, the natural join, of course! It's like the perfect dance between the two tables, where they come together seamlessly. I can almost hear the music playing in the background.
LI
Linsey
1 year ago
User 4: It's like music playing in the background.
AV
Avery
1 year ago
User 3: It's true, they come together seamlessly.
YA
Yan
1 year ago
User 2: Yes, the natural join is like a perfect dance between the tables.
PE
Pete
1 year ago
User 1: I think the answer is C) Natural join.
WH
Whitley
1 year ago
Hmm, I'm not sure. Maybe the Cartesian product would work, but that might give us more data than we need. I'll have to think this one through carefully.
VA
Vannessa
2 years ago
The natural join operation would be the correct answer here. It combines the related data from the Stu_Act and Act_Fee tables based on the common attributes.
IS
Isaiah
1 year ago
The natural join operation would be the correct answer here. It combines the related data from the Stu_Act and Act_Fee tables based on the common attributes.
HA
Hassie
1 year ago
D) Cartesian product
LI
Linette
1 year ago
C) Natural join
ZA
Zachary
1 year ago
B) Intersection
VA
Vannessa
1 year ago
A) Union
GE
Gertude
2 years ago
I'm not sure, but I think D) Cartesian product could also work if we want all possible combinations of rows.
CA
Candra
2 years ago
I agree with Marion, because we need to combine the tables based on a common attribute.
MA
Marion
2 years ago
I think the answer is C) Natural join.