I trying to make into using only SQL queries. It is kind of similar to using groupByKey() in pyspark. Is there a way to do this? Answer Just use conditional aggregation. One method is: In Postgres, this would be phrased using the standard filter clause:
How to create procedure in mysql
I am creating a procedure in mysql but I am facing issues with the required result and now I am in a total mess. Please help me! The requirements is this: Get the Top 20 entries from the table, for the current day. By Top 20 entries, they should be the ones that occurred most often during the day –
Conditional Aggregation with multiple case and group by
The query below gives me average of case when QuoteStatusID = 6 but it I am having issues with associating the average by Street column. QuoteTable QuoteID QuoteStateID ProjectManager_userID Shipping_AddressID 1 6 12 56 2 6 12 56 3 26 12 56 4 6 12 18 5 26 12 18 Shipping_AddressID 56: 338 Elizabeth St 18: 83 E…
MySQL Tables / Schema are duplicating themselves
All of a suddned I noticed that my tables have began to duplicate themselves and I don’t know why or what I have done to cause this. Does anyone know? The last thing I remember doing is setting up …
Function returns row type as single value instead of one value per field
The only time I encountered a similar problem on SO is on here, but the proposed solution was not relevant for me. I call a PostgreSQL function, but it’s returning a single value instead of one value per field, which I can access. I have a table “Words”, which consists of a primary key word …
Symfony 5 – “An exception occurred in driver: could not find driver”
I’m currently face to this problem. I am really new beginer at Symfony. Problem : When i create a new db with cli symfony console doctrine:database:create, i am getting these errors : Iam using php 7.4 with xampp and normaly pdo_sql is installed : this is my .env file config : And this is my doctrine.ya…
Creating primary key in postgresql takes days
I am trying to write my table to a PostgreSQL database then declare a primary key. My data is really huge (includes billions of rows and total size is approximately 150 GB), when I try to create a primary key after writing the table, it takes forever. Here is how I define the primary key; I am %101 sure about
How to store user content while avoiding XSS vulnerabilities
I know similar questions have been asked but I am struggling to work out how to do it. I am building a CMS, rather primitive right now, but it’s as a learning exercise; in a production site, I would use an existing solution for sure. I would like to take user input, which can be styled in a WYSIWYG edit…
How to get interpolation value in SQL Server?
I want to get interpolation value for NULL. Interpolation is a statistical method by which related known values are used to estimate an unknown price or potential yield of a security. Interpolation is …
SQL Query – Orders Not Shipped With Next Expected Date
I am struggling with a query. I need to be able to show outstanding orders (not shipped). An order item can have a date when the customer is expecting the item by. This can be NULL. I have the …