I want count column per specific user, using data from 3 tables. TABLE 1 (users) : SAMPLE : TABLE 2 (data) : SAMPLE : TABLE 3 (access): SAMPLE : What i tried so far : Result : I what to link it with user name alse, Desired Result : Answer Seems you need also a join for users and as
Tag: aggregate-functions
How to select MAX from AVG?
I’m practicing for my SQL exam and I can’t figure out the following question: “Of the average amount paid per customer, show the highest amount.” So to retrieve the average amount paid, I would do the following: Then I would like to retrieve the highest average amount out of this list of averages. I thought the following would do the
Concat rows for employee roles
I’m using SQL Server. Looking for similar functionality as GROUP_CONCAT or listagg functions provided in other Databases. Seems like STUFF function is provided to concat rows. Here’s my attempt. Employee Role EmployeeRole Expected Output Answer In SQLServer 2017, you can use aggregate function STRING_AGG(): Note: table aliases make the query more concise and easier to read. I modified the query
GROUP_CONCAT to return an object array in a many to many relationship
I am working on a mySQL query for a personal project. Right now the end goal is to have the query return the following json for each item: My most recent attempt is: Which is giving me an internal server error. Testing it with a simplier query goes through fine so I’ve narrowed it down to the query itself being
mysql – running sums for multiple categories with group by clause
I have this table: CREATE TABLE tbl_sample ( ID SERIAL PRIMARY KEY ,sale decimal(10,2) ,pc varchar(45) ,trans_date date ); INSERT INTO tbl_sample VALUES (1,100, ‘p1′,’2019-08-27’ ),(2,150, ‘p2’,…
Get the newest record using date and time portion, getting error on aggregate function
I am trying to get the most recent record(s) with a status of Registered, Expired, using the status date value to get the latest one. The query I have , I am using a specific lot number that has 13 …
Is there a difference between Oracle SQL ‘KEEP’ for multiple columns and ‘KEEP’ for one and GROUP BY for the rest?
I’m just now learning about KEEP in Oracle SQL, but I cannot seem to find documentation that explains why their examples use KEEP in all columns that are not indexed. I have a table with 5 columns …
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 …
How to write SQL query to find max and min salary along with employee name in Oracle
I have one employee table. Please find below the table structure along with data. I want to find the maximum salary and minimum salary along with employee name. expected output will be: To find out the maximum salary along with employee name I have written this query: And to find out the minimum salary along with employee name I have
Aggregations in SQLite
I am looking to construct a SQL query which is able to sum up installment values by month. Ordinarily this wouldn’t be too hard as you would simply sum the installment values and group by month. …