I am trying using the following query on a POSTGIS (Postgres) Database. The original question: https://gis.stackexchange.com/questions/313252/postgis-sql-query-filter-by-bounding-box SELECT …
Tag: sql
Is a non-clustered index implicitly created for each foreign key in a table?
If I have a table like so: CREATE TABLE MyTable ( Id INT PRIMARY KEY IDENTITY(1, 1), FooId INT NOT NULL FOREIGN KEY REFERENCES Foo(Id), Data NVARCHAR(10) NOT NULL ); The following …
Oracle: Analytical functions Sub totals after each change in value
I have the following data (order of records as in the example): A B 1 10 1 20 1 30 1 40 2 50 2 65 2 75 1 89 1 100 from SQL: with x as ( select A, B from ( select 1 as A, …
SQL selecting data between particular date and additional field filter
I have the a sql table payments with the following columns: id|name|amount|reference_number|payment_date|status And here is some values 1|John Doe|10.00|123456G|2019-02-21 08:00:21|confirmed 2|John …
MySQL: How to track a players total kills throughout his career
I have a table structure with 4 essential columns: match_id date player_id kills (of a player in the current game) The table will have data for many different player_ids, and what I want to …
How to improve JPA Query performance and response time on multiple Join tables and conditions
I am very fresh java beginner and I am trying to implement possibility to review documents. User, who belongs to a certain group can review documents of particular types that are assigned to that …
Postgres aggregrate function for calculating vector average of wind speed (vector magnitude) and wind direction (vector direction)
I have a table with two columns wind_speed and wind_direction. I want to have a custom aggregrate function that would return average wind_speed and wind_direction. wind_speed and wind_direction in …
Converting HEX string into int [closed]
I need help on converting the varbinary data which I acquired from sql, into int by taking 4 bits at a time. From the code above, I acquired the results as (‘0x640761075D075A0…..’). My plan is to …
MySQL FullText in Boolean mode: searching keywords that contain ‘+’ as part of the string
I have looked at dozen ‘similar’ questions, without luck. I understand that + attached to a keyword in FULLTEXT in BOOLEAN mode has a special meaning, however, what if our keyword(s) actually contain +…
SQL count rows with same value in column and group by id?
i have a table like this: i wonder if its possible to count the rows with same value and group them by id , but every time the code will return count 1 if i group them by id and not by value wanted output: Answer You need to count the value of the column value for each id: See