I have a table which has the following columns: Date, AcctId, CustID, BackupID, Logins, Amount. For a given Date, an AcctID can more than one CustIDs, but I want to assign a singular CustID to an AcctID based on the value of Logins. i.e.: If Cust1 has more Logins than Cust2 for the given Date and AcctID then CustID should
Tag: self-join
How self join works [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 have a customer table: I want to have a new column referred_name
SQL table join on itself but allow “0” value
Okay so i have a simple table “category” on this table categories and subcategories are saved. categories have “parent_id=0”, and subcategories have a “parent_id” that equals the row_id of the …
Python Pandas non equal join
Have table OUT Need: so i need make non equal join equivalent SQL query : or as SQL query: The problem in PANDAS is that NON EQUAL SELF JOIN cannot be done with MERGE. And I can’t find another way….. Answer We can solve this in pandas in a smarter way by using groupby with agg and joining the strings.
MySQL self join to find only the next revision
Actually I’m working with Wordpress. I want to create a self-join or something similar to find a revision of a post, and the following revision of the same post. https://www.db-fiddle.com/f/eHnwYABYrVVQAhn8xLJ77q/1 The previous query doesn’t work since it takes, for every record of a, all the revision which have been made and not just the next one. This is what I
Is there a way to change this BigQuery self-join to use a window function?
Let’s say I have a BigQuery table “events” (in reality this is a slow sub-query) that stores the count of events per day, by event type. There are many types of events and most of them don’t occur on …
MySQL category with parent_id – SELF Join
My SQL table called categories has the following structure: I would like to know if it’s possible to JOIN the same table and present the parent_id name. I can do this by PHP code, but I would like, because of performance issues, to retrieve as SQL Query. See example at SQLFiddle I’ve managed to JOIN the table, but somehow the
UPDATE rows with values from the same table
I have a table like this: I want to copy the last 3 values and at the end my table will look like this: Is it possible? Answer Use a self-join: If there are gaps in the ID space, generate gapless IDs with the window function row_number(). I do that in a CTE, because I am going to reuse the