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QUESTION
I need to assign default value to column SERVERTIME with datatype TIMESTAMP_NTZ in snowflake. I have a below query:-
...ANSWER
Answered 2021-Jun-15 at 08:56Please make sure the data type is included and matched with the expression:
QUESTION
Just a curious question in my mind and I thought of asking to Snowflake experts to clarify this question. We know that Snowflake default isolation level is read committed; I have one transaction let us A in which I am truncating data from Table T1 and Loading the Table T1 using transformed fresh data; at the same time I have another transaction say B is trying to read the data from Table T1 while getting this data truncated in transaction A; would I be able read the data from Table T1 in transaction B which it is still getting truncated in another transaction A.
My mind says yes; transaction B should be able to read it from Table T1 because transaction A still in progress and not yet committed.
...ANSWER
Answered 2021-Jun-15 at 07:53Try running these 2 scripts in two different tabs with app.snowflake.com:
Script 1:
QUESTION
I want to know if an object has been in the same location for >8 hours. Any ideas how to derive that from this data sample? Thx
ObjectID DateTime Lat Lon 23 5/2/2021 12:00 40.11 -30.34 23 5/2/2021 16:00 40.11 -30.34 23 5/2/2021 23:00 40.11 -30.34 24 5/2/2021 12:00 40.11 -30.34 24 5/2/2021 16:00 40.11 -30.34 24 5/2/2021 23:00 39.88 -29.00 25 5/2/2021 12:00 40.11 -30.34 25 5/2/2021 16:00 39.88 -29.00 25 5/2/2021 23:00 40.11 -30.34ObjectID 23 should be returned because it was in the same location >8 hours
ObjectID 24 should not be returned. It may have been in the same location >8 hours, but based on our data we cannot be sure.
ObjectID 24 should not be returned. The 12:00 & 23:00 locations are the same, but the object was somewhere else in between (16:00).
Update: This is in Snowflake
...ANSWER
Answered 2021-Jun-14 at 23:03You can treat this as a gaps-and-islands problem and then aggregate to find the time where the lat/lon is the same:
QUESTION
I'm trying to make a complete copy of a Snowflake DB into PostgreSQL DB (every table/view, every row). I don't know the best way to go about accomplishing this. I've tried using a package called pipelinewise , but I could not get the access needed to convert a snowflake view to a postgreSQL table (it needs a unique id). Long story short it just would not work for me.
I've now moved on to using the snowflake-sqlalchemy package. So, I'm wondering what is the best way to just make a complete copy of the entire DB. Is it necessary to make a model for each table, because this is a big DB? I'm new to SQL alchemy in general, so I don't know exactly where to start. My guess is with reflections , but when I try the example below I'm not getting any results.
...ANSWER
Answered 2021-Jun-14 at 19:29Try this: I got it working on mine, but I have a few functions that I use for my sqlalchemy engine, so might not work as is:
QUESTION
I have the following table in a Snowflake data warehouse:
Client_ID Appointment_Date Store_ID Client_1 1/1/2021 Store_1 Client_2 1/1/2021 Store_1 Client_1 2/1/2021 Store_2 Client_2 2/1/2021 Store_1 Client_1 3/1/2021 Store_1 Client_2 3/1/2021 Store_1I need to be able to count the number of unique Store_ID
for each Client_ID
in order of Appointment_Date
. Something like following is my desired output:
Where I would be actively counting the number of distinct stores a client visits over time. I've tried:
...ANSWER
Answered 2021-Jun-14 at 14:26If I understand correctly, you want a cumulative count(distinct)
as a window function. Snowflake does not support that directly, but you can easily calculate it using row_number()
and a cumulative sum:
QUESTION
I am trying to find a way for connection pool management for external connections created in Airflow.
Airflow version : 2.1.0
Python Version : 3.9.5
Airflow DB : SQLite
External connections created : MySQL and Snowflake
I know there are properties in airflow.cfg file
...ANSWER
Answered 2021-Jun-14 at 10:48QUESTION
I'm trying to read data from snowflake database table into databricks. Below is my code:
...ANSWER
Answered 2021-Jun-11 at 05:16Change sfUrl to sfURL and then test this operation.
QUESTION
I have a list: reward_coupons, which is a list that can range in length from 1- 9 and contain reward IDs.
I have a table (which I call from an identifier table name) which contains 9 columns named reward_id_01,reward_id_02...reward_id_09.
In my reward_coupons list, customers can recieve 1 up to 9 rewards, so I would like to create a loop which inserts the values I have in my list(in order) to the table (identifier ($table_name))
...ANSWER
Answered 2021-Jun-11 at 04:45I have found the solution to to this problem.
It seems that because "Column" is not a datatype you cannot pass a variable in using the following syntax:
QUESTION
I am working on Snowflake, need to substract 2 hours from specifc date:
date time: 2021-06-10 14:07:04.848 -0400
'2021-06-10 14:07:04.848 -0400' - 2 hours
expected result: 2021-06-10 12:07:04.848 -0400 (now it's twelve o'clock).
Datediff didn't work:
...ANSWER
Answered 2021-Jun-10 at 21:16Using INTERVAL
:
QUESTION
I have a table ADS
in snowflake like so (data is being inserted each day), note there are duplicates entries on rows 3 and 4:
I want to select all entries based on ID
with the max REPORT_DATE
- essentially I want to know the latest number of CLICKS
and IMPRESSIONS
for each ID
:
This query successfully gives me the max DATE
for each ID
:
ANSWER
Answered 2021-Jun-09 at 18:06You could use QUALIFY
and ROW_NUMBER()
:
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