I have to compute the duration of events in postgres based on start_time and end_time, both are in the HH:MM:SS format. Simply end_time – start_time works: create table test_date as select sum(…
Tag: date
Difference between NVL and OR in SQL oracle
Hej guys, could someone explain to me difference between NVL() and OR in below query : Number of rows: 44937 and Number of rows: 44782 Why we have this difference: 155 rows? i built a few query based on nvl and notice that issue and going to switch to OR, but I really want to know, why it such a
Selecting new distinct values over time (ORACLE SQL)
I want to select new distinct values and track them over time. I have a table where each row represents a score awarded to a particular person. – timestamp (when the score was awarded) – name (which person received the score) – score (what score the person received) I want the result to look like: The above table should be
Inserting rows based on conditions
Table Name: CaseHistory I’m currently working with a dataset that aims to offer insights on customer support cases on a weekly basis. In the example above, you can see the progression of case 123376 from Week 1 till Week 5, amongst other cases. What I would like to be able to do is insert a row for a case for
How to grant permissions in Postgres on tables that start with parcel?
Answer GRANT takes only fixed table names (or list of tables). What you want require dynamic SQL, ie dynamically building a statement and executing it in an anonymous block. Consider:
MySQL select complete last month
How to select all data from last month (or 30 days)? I already found some answers, and mostly gives this solution But this gives me also the dates from the future I am only interested in the days from last month or 30 days (not next month and beyond) Answer Is this what you want? I added a condition so
SQL Union as Subquery to create Date Ranges from Start Date
I have three tabels, each of them has a date column (the date column is an INT field and needs to stay that way). I need a UNION accross all three tables so that I get the list of unique dates in accending order like this: Then I need to add a column to the result of the query where
How can i mention AM/PM while inserting time value into a table in sql server?
I am trying to insert values in time and column of table(doughnut_ratings) separately, but it is giving following syntax error: Msg 241, Level 16, State 1, Line 65 Conversion failed when converting date and/or time from character string. I am writing the following query, please suggest Answer The problem isn’t the time (‘7:43 am’), which can be converted without issue.
Join two columns as a date in sql
I am currently working with a report through Microsoft Query and I ran into this problem where I need to calculate the total amount of money for the past year. The table looks like this: How would you calculate the total amount from 02-2019 to 02-2020 for the item number 12345? Answer Assuming that you are running SQL Server, you
Teradata SQL returning previous two months, based on CURRENT_DATE
TLDR: I want to get a table with the previous two months in Teradata, based on CURRENT_DATE. Currently I can only get the previous month: Expected output is: Long version: I want something, that could be used in a bigger query like this, valid for every day of the year, without hardcoding the dates. The bigger query with the hardcoded