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When loading data into a table that captures the load time in a column with a default value of either CURRENT_TIME () or CURRENT_TIMESTAMP () what will occur?
Suggested Answer: D
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When using the COPY command to load data into Snowflake, if a column has a default value set to CURRENT_TIME() or CURRENT_TIMESTAMP(), all rows loaded by that specific COPY command will have the same timestamp. This is because the default value for the timestamp is evaluated at the start of the COPY operation, and that same value is applied to all rows loaded by that operation.
34 comments · newest first
KE
Kenneth
11 months ago
C makes no sense, the source creation time isn't relevant here.
SH
Shay
11 months ago
B is incorrect, it’s not about when they were read.
CY
Cyril
11 months ago
Wait, so if I use CURRENT_TIMESTAMP, they all get the same? That's surprising!
TR
Trinidad
11 months ago
I disagree, it's definitely A! Each row gets its own time.
LA
Laurene
11 months ago
I think it's D, all rows get the same timestamp.
BE
Berry
12 months ago
I’m confused about the difference between CURRENT_TIME() and CURRENT_TIMESTAMP(). I thought they both would give the same result in this context.
IR
Ira
12 months ago
This reminds me of a practice question where we loaded data and saw that timestamps were consistent across the batch. I feel like D could be correct.
RI
Rikki
12 months ago
I’m not entirely sure, but I think if we use CURRENT_TIME(), it might vary based on when each row is processed.
GA
Galen
1 year ago
I remember discussing how CURRENT_TIMESTAMP() captures the exact time when the row is inserted, so I think all rows should have the same timestamp.
ER
Erinn
1 year ago
Ah, I think I see what they're getting at. If the column has a default of CURRENT_TIME() or CURRENT_TIMESTAMP(), then each row loaded by the COPY statement should get a unique timestamp, based on when that row was inserted. So option A seems like the correct answer.
LU
Luisa
1 year ago
I've got a strategy for this. Since the question is specifically about the COPY statement, I think the key is understanding how that statement handles default values. If the COPY statement is loading multiple rows at once, the timestamps may vary depending on when each row is inserted.
KI
Kimberely
1 year ago
I'm a bit confused on this one. The wording is a bit tricky, and I'm not sure if the timestamps will be based on when the rows were read, inserted, or created in the source. I'll need to double-check my understanding of how default timestamp values work.
RA
Ranee
1 year ago
Okay, let me think this through step-by-step. If the column has a default value of CURRENT_TIME() or CURRENT_TIMESTAMP(), that means the timestamp will be set when the row is inserted, right? So the question is about how that interacts with the COPY statement.
EL
Eliseo
1 year ago
Hmm, this is an interesting one. I think I'll need to carefully consider the implications of the default timestamp values and how they might be affected by the COPY statement.
PE
Percy
2 years ago
I'm not sure, but I think the answer might be C) Any rows loaded using a specific COPY statement will have varying timestamps based on when the rows were created in the source.
SA
Sabrina
2 years ago
I disagree, I believe the answer is A) All rows loaded using a specific COPY statement will have varying timestamps based on when the rows were inserted.
LO
Louisa
2 years ago
Hold up, is this a trick question? What if the table has a trigger that updates the timestamp on every insert? Gotta be option A then!
JE
Jeannetta
2 years ago
I'm channeling my inner Sherlock Holmes for this one. Option C seems to be the logical choice - the timestamps should be based on the source data, not the load time.
GL
Glendora
2 years ago
This is a tricky one, but I'm leaning towards option D. Can't have varying timestamps if the default is a single function call, right?
MA
Mattie
2 years ago
I see your point, it does make sense that all rows loaded at the same time would have the same timestamp.
DA
Daniela
2 years ago
That's a good point, maybe option A would be more accurate then.
LI
Lilli
2 years ago
But wouldn't the timestamp be based on when the rows were inserted, not when they were created in the source?
GE
Gerald
2 years ago
I think you're right, option D seems to be the most logical choice.
ZO
Zona
2 years ago
Haha, the question says the default value is CURRENT_TIME() or CURRENT_TIMESTAMP(), so of course the timestamps will vary. I'm picking option B.
CH
Charolette
2 years ago
Definitely, the default values will give different timestamps. Option B is the way to go.
ED
Edison
2 years ago
Yeah, the default values will result in varying timestamps. Option B makes the most sense.
AL
Alyssa
2 years ago
I agree, the timestamps will definitely vary. Option B seems like the right choice.
LA
Lauran
2 years ago
I'm going with option A. The timestamps should vary based on when each row was inserted during the COPY operation.
BR
Britt
2 years ago
Hmm, I think option D is the correct answer. All the rows loaded using a COPY statement should have the same timestamp value based on when the COPY statement was executed.
CH
Chanel
2 years ago
Definitely, it helps with tracking and maintaining the accuracy of the data.
DY
Dyan
2 years ago
I think so too, having a consistent timestamp for all rows loaded is important for data integrity.
ER
Ernie
2 years ago
Yeah, it makes sense that all rows loaded at the same time would have the same timestamp.
CA
Caren
2 years ago
I agree, option D seems to be the most logical choice.
EV
Evangelina
2 years ago
I think the answer is D) All rows loaded using a specific COPY statement will have the same timestamp value.