Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question I calculate hours that the air temperature below 7.22. I want to do this calculation on the S…
Tag: sql
Obtaining summary result since last occurence of specifc hour of day in postgresql
I have rainfall measurements stored in a postgresql table and wish to select the min and and max value since the last occurence of 9am, whether that is 9am of the current day, if after 9am, or 9am of …
SQL column default value set using row wise operations
Is it possible to set a default value in a SQL column to be consisted of other columns? For example, in the table below is it possible to have the EndDate default to StartDate + NoOfDays? So when …
PHP Prepared MySQL UPDATE Statement with Variable inside of a string
I am trying to include a variable inside of a string in an update query but seem to be having trouble. I am just now updating all of my old websites to use prepared statements so I am not that familiar with them yet. What do I need to do to get the string and variable connected in the query.
How to get all items that are tagged Tag1 AND Tag2 AND … for a 3-table tag solution
So I implemented a 3 table tag solution, als indicated in this classic post (so-called “Toxi” solution). Everthing works splendid, the only thing I struggle with is to get all items that are …
ms access, need to get all rows with a distinct column
I have a table called “parts” which stores information on electrical connectors including contacts, backshells etc. all parts that are part of an assembly have a value in a column called &…
Possible for a MySQL trigger to silently fail?
I’m pulling my hair out trying to debug something. We have large raw tables where ecommerce data gets added to at high. We have summary tables that are populated via insert, update, and delete triggers which are used when users query from our UI. So, those two tables should “match” which is …
BigQuery – How to find count of Unique overlapping values in 1 or or more categories (Count of categorical values)?
I am very new to BigQuery and standard SQL. I might not be able to figure out the correct approach to solve a problem. Please help me out. Please help me change this code to get the desired output. I have a Color Column and a ID column. Example shown below: Color | ID Blue | id_1 Blue | id_5
How to query many-to-many relation with features table (AND condition)
I guess this is a common setting, but as I don’t do that much SQL work, I can’t get my head around this one… So, I’ve got a bunch of songs that have certain features (style of music, mood etc.) and …
SQL: execution model for recursive CTEs
I’m trying to understand how recursive CTEs are executed and particularly what causes them to terminate. Here’s a simple example: WITH cte_increment(n) AS ( SELECT — Select 1 0 UNION …