I am trying to get a total count of records from 1st Jan till date, without skipping dates and returning 0 for dates that have no records. I have tried the following: orders is an example table and …
Tag: datetime
How do I return only the most recent record on a date field split into two
Scenario: Person A takes test B three times in the span of two year. There will be three entries for that person. However, I need to write a query that tells me the number of Persons that have taken a test(just one, the latest test). The problem with this is I have a column labeled, Test_Month (xx) and Test_year(xx). What
How to determine the number of days in a month for a given Date Range?
I need to calculate using SQL Query, how many days within a given range fall into each calendar month. I have given 2 dates, which define a date range; for example 2020-01-01 to 2020-08-03. I need to find how many days in that range fall in to each month i.e. how many fall into July, and how many into August.
Comparing TIME WITH TIME ZONE returns unexpected result
Why does this query return false? Is it because of the 22:51:13.202248 +01:00 format? SELECT now()::time at TIME ZONE ‘Europe/London’; — 22:51:13.202248 +01:00 SELECT now()::time at time zone ‘…
Find the longest rainless time (every hour, beyond several days)
I have a weather station where I measure the amount of rain per hour and save the data in a database. The rain-table looks like this: Now I want the longest rainless time per month. I already have a solution, but it only works for the respective day. However, if there is no rain for several days, my solution will
Remove items 30 minutes after their duration
In a table in my database, I have a date and time column (datetime) that stores the time when the event will occur. How can I delete that event 30 minutes after it happened?
Postgres converting double double precision to text creates ‘1.50000000000’
Working with postgres and I need to convert total minutes into the format of 1h 1m. I’m doing this via the following code replace( (119 / 60 + (119 % 60) / 100.0)::text, ‘.’, ‘h ‘ ) + …
Is there an sql script to get the date and time a query was run?
I wondered if anyone can help. I need to get the date and time an sql query was run. I would like the output to be in the following format; YYYY-MM-DDThh:mm:ss Does anyone know what sql to write get …
SQL – Select the most close values to date in a table
Hi everyone i have a table called measure made up like this And I want to select all the lowest values such as I can do it by code but i prefer to use SQL for performance reason so I tried this query: but the result is not good, I see too many results and are also somehow duplcated, how
How to calculate AVG, MIN & MAX of date interval of a column in a table?
I have a table more like this +—-+————-+———————+ | id | order_id | transaction_date | +—-+————-+———————+ | 1 | TEST000001 | 2018-01-01 00:00:10 | | 2 | TEST000002 | 2018-01-01 00:10:10 | | 3 | TEST000003 | 2018-01-02 03:18:01 | | 4 | TEST000004 | 2018-02-04 05:00:00 | | 5 | TEST000005 | 2018-02-10 16:00:10 | +—-+————-+———————+ There is datetime