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Get First Record of Each Group

First I would like to apologize if it is a basic question. So, i have monitoring data being stored every 5 seconds. I want create a query that returns me the first record every 10 minutes, for example:…

SQL group and summing at new row

I have an issue where I am trying to create a new “row” (not part of the database) where it only gives me the SUM of the “count” column. I am wondering if that is possible? I tried adding the SUM(count(cost) as “total product cost” OVER() AS Total_Count; but that just creat…

Optimising postgresql query

I have this query which is rather slow for my liking : Explain analyse output Is there an index I can put on to speed this up (bearing in mind that the values for the order by will be dynamic)? I was thinking a partial index on where bust,figure,age,hair ethnicity is not null and status = ‘online’…

Update SQL table using C#

I’m trying to update EpisodeId no:117 in the Episode table and it executes successfully but when I check the table it is not updated. int episode Id = 117; Answer There are some issues with your SQL update statement.Look at following for reference to Update Statement in SQL LINK There is also an easier …