I have the following structure: Training Type Contains multiple sessions Each session can have multiple slots A slot has a start date. (date column) How to compute for each Training Type the total of sessions whose all the slots are…
Postgres implicitly sorts row based on the group by column. In MySQL, we can change this behavior by setting the ORDER BY NULL. Is there any similar alternative way to achieve this in Postgres [Reference]?
I have the following data: id1 id2 score 281 33453 23 281 33452 23 281 36466 24 282 12118 14 282 27603 18 How do I write my query in PostgreSQL in the most efficient way so that I keep…
raw data no group date value flag 1 a 2022-10-13 old y 2 a 2022-10-15 new y 3 b 2022-01-01 old n 4 b 2022-01-03 new n step1. insert no1 raw step2. modify date value using by no2 raw and…
How to extract the difference of a specific column of multiple rows with same id? Example table: id prev_val new_val date 1 0 1 2020-01-01 10:00 1 1 2 2020-01-01 11:00 2 0 1 2020-01-01 10:00 2 1 2 2020-01-02…
I am trying to calculate the percentage of the row events when the value is null. I have a table with 2 rows (zip_code, events). TABLE weather events TEXT zip_code INTEGER This is the query I wrote. I am just…
I have a table similar to this: product_id client_id category price created_date 1 1 A 3.1 2022-11-01 2 1 A 3.2 2022-11-02 3 1 B 3.3 2022-11-03 4 1 B 3.4 2022-11-04 5 2 B 3.5 2022-11-05 6 2 B…
I have Data which indicates month of Order date and month of Shipment date. I want to convert the records which will show, in each month, what is the count of orders and in same month what is the count…
I want to 'group by' beers so that they are grouped together, with the respect aggregate rating and tasters (people who review the beers) listed in separate columns. Here is my code: create or replace view tasters_avg_ratings1 as select a.taster…
Currently, I have a DB table called mytable which looks like this id startTime result 100 2022-11-17 06:19:00 pass 101 2022-11-17 07:19:00 fail 102 2022-11-17 08:44:00 pass 103 2022-11-17 16:19:00 fail 104 2022-11-16 06:11:00 pass 105 2022-11-16 06:11:00 fail 106…