I have a database with the following fields: UserID, DateRecorded and Score. A new entry is added to the table each time the score is updated. Here is an example of a user record: From the query I would like it to show me only the scores of all users with the earliest DateRecorded. Although not much familiar with cursors,
Tag: greatest-n-per-group
Select multiple columns with not all columns mentioned in Groupby – Postgres v12
I have a table which contain review_id,product_id,ratings,reviewer_id,review_comments. The table i have is as below. My need is quite simple but I have issues figuring it out. Need is to get …
MySQL – Joins and Subqueries [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 2 years ago. Improve this question I’m looking a question that asks ‘List for each year the name of
How to display the related records in a single row in Oracle SQL?
I wrote a query joining two tables and I got a below resultset: However, I need to display below output with one new field called ‘Status’.Mark can work in both the departments and so the count is “2” and the status will be ‘Y’ ( displaying of any one record is okay) . Justin works in only one department and
MAX Date for each row
I am having some difficulty at writing a syntax that will provide me with the most recent date for several results. Little bit of background, I am pulling live data from an IBM AS400, I have no SQL tables, I am connecting to the tables via ODBC, using QTODBC to create my queries, then I export them to Power Bi.
Getting student name with highest total mark in SQL
I have table named ‘marks’ which stores marks of students. I want to get the name of student who has highest total mark. I tried query like this But this is not working. Can anyone please help ? Answer get the max() total first then use a subquery
Get the highest category while performing other type of aggregates
Story: I am trying to get the sum of records and the max date by country and games and another column that would rank the top countries based on the sum of records: It is the country rank column that is giving me trouble. Here’s what I tried: All it does is rank the each row partition by country which
MySql last record from group by item_id with order by date
My database table name is ledgers and fields are id, item_id, date, …other fields I Want the last record from (groupBy item_id order by date ASC). from each group. I tried below query Can you guys please help. Answer You can filter with a correlated subquery: For performance, consider an index on (item_id, date). Another option is to use rank()
Selecting columns from tables based on max value of another column
I have two tables and I want column input from first_table and column output from second_table based on the latest finished time first_table: second_table result_table I am trying to use this query: Answer You can use a correlated subquery in the on clause of the join: For performance here, you want an index on second_table(id, finished_time). This can also be
pick the first result for each parameter
I have a table with account_number, account_code and code_date I am trying to get the latest code for each account, but the group by is giving me multiple observation for each account, thus I can’t …