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A business analyst has been asked to create a data entity/object called sales_by_employee. It should always stay up-to-date when new data are added to the sales table. The new entity should have the columns sales_person, which will be the name of the employee from the employees table, and sales, which will be all sales for that particular sales person. Both the sales table and the employees table have an employee_id column that is used to identify the sales person.
Which of the following code blocks will accomplish this task?
A)
B)
C)
D)
Suggested Answer: D
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The SQL code provided in Option D is the correct way to create a view namedsales_by_employeethat will always stay up-to-date with the sales and employees tables. The code uses theCREATE OR REPLACE VIEWstatement to define a new view that joins the sales and employees tables on the employee_id column. It selects the employee_name as sales_person and all sales for each employee, ensuring that the data entity/object is always up-to-date when new data are added to these tables.
44 comments · newest first
ST
Stephanie
10 months ago
Not sure about B, seems a bit off to me.
AL
Aliza
11 months ago
Totally agree with A, it’s straightforward!
DO
Donte
11 months ago
Wait, does Option D even join the tables correctly?
OZ
Ozell
11 months ago
I think Option C is the better choice.
JA
Janine
11 months ago
Option A looks solid for real-time updates.
AR
Aracelis
12 months ago
I recall that we should use a GROUP BY clause for summarizing sales by employee, but I can't remember if that was in option C or D.
AR
Aretha
12 months ago
I think I might be overthinking this. If the entity needs to stay up-to-date, wouldn't it require some kind of trigger or scheduled job?
MI
Mitsue
12 months ago
This question feels similar to the practice ones where we had to aggregate sales data. I think it might be option B, but I need to double-check the syntax.
AR
Art
1 year ago
I remember we discussed how to join tables using employee_id, but I'm not sure which code block actually updates the entity automatically.
KR
Kristine
1 year ago
This seems pretty straightforward to me. I'd just use a simple GROUP BY query to aggregate the sales data by employee, and then join that back to the employees table to get the sales_person column. I'm leaning towards option B.
EA
Earleen
1 year ago
Okay, I think I've got a handle on this. The key is to join the sales and employees tables on the employee_id column, and then aggregate the sales data by the sales_person column. I'd probably go with option C, as it looks the most straightforward.
CO
Corazon
1 year ago
Hmm, I'm a bit confused by the wording here. Do we need to create a new table, or just a view? And how exactly should we link the sales and employees tables? I'll need to think through the logic carefully.
AR
Aracelis
1 year ago
This looks like a pretty straightforward data transformation task. I'd start by carefully reading through the requirements to make sure I understand exactly what the new entity needs to contain and how it should be updated.
MI
Minna
1 year ago
Hmm, I'm a bit unsure about this. I'll need to double-check the details on the different import options to make sure I pick the right one.
TR
Truman
2 years ago
Hmm, Option B it is. Although, I'm a little worried about that 'always stay up-to-date' part. Sounds like a lot of work!
SO
Sophia
2 years ago
User 4: Option B it is then, let's hope it keeps everything up-to-date.
AD
Adelina
2 years ago
User 3: I agree, Option B seems like the best choice.
GA
Gail
2 years ago
User 2: Yeah, Option B looks like it will do the job.
LE
Lettie
2 years ago
I think Option B is the way to go.
FL
Fletcher
2 years ago
Option B for the win! I bet the person who wrote this question is a real stickler for detail. Gotta love those data analysts!
NO
Novella
2 years ago
I'm going with Option B too. The other options seem to be missing some key steps to keep the data up-to-date.
TA
Tamra
2 years ago
Option B looks like the way to go. It's the only one that joins the sales and employees tables to get the sales person's name.
QU
Queenie
2 years ago
Yes, option B is the correct one as it includes the join between sales and employees tables.
NI
Nidia
2 years ago
Option B seems to be the most efficient way to create the data entity.
AL
Alida
2 years ago
I agree, option B is the best choice because it joins the necessary tables.
KA
Kallie
2 years ago
Hmm, I'm not sure. Maybe we should ask the instructor if they accept 'All of the above' as a valid answer. You know, just to cover our bases.
EL
Eleonora
2 years ago
Let's double-check with the instructor to see if selecting 'All of the above' is an acceptable choice.
RE
Renato
2 years ago
I agree, we don't want to miss any important details that could affect the outcome.
CA
Cammy
2 years ago
I think we should carefully review each code block before making a decision.
BE
Becky
2 years ago
Why do you think option C is correct?
EL
Elizabeth
2 years ago
I disagree, I believe option C is the right one.
TR
Tresa
2 years ago
Whoa, hold up! Option D is clearly the answer. It's the only one that fully addresses the requirement to keep the data up-to-date.
CH
Chuck
2 years ago
I agree with you, Option D seems to be the most comprehensive solution for this task.
TA
Tamesha
2 years ago
I'm not sure, Option A looks like it could work as well. It seems to update the data correctly.
HA
Harley
2 years ago
I think Option D is the best choice too. It covers all the requirements.
BE
Becky
2 years ago
I think the correct code block is option A.
SH
Shenika
2 years ago
I'm not convinced. Option C seems like it could be a more efficient way to handle this task.
AN
Anika
2 years ago
I'm not convinced, Option C seems like it could be a more efficient way to handle this task.
CH
Chauncey
2 years ago
I agree with User1, Option A seems like the right approach.
LU
Luisa
2 years ago
Option B looks like a good choice to me.
MI
Mirta
2 years ago
I think Option A might work for this task.
OL
Oliva
2 years ago
Option B looks like the way to go. It's the most straightforward and intuitive solution to the problem.
KA
Karina
2 years ago
User 2
MA
Markus
2 years ago
User 1