Search results
14 cze 2013 · ;WITH ChildrenCTE AS ( SELECT RootID = ID, ID FROM @Data UNION ALL SELECT cte.RootID, d.ID FROM ChildrenCTE cte INNER JOIN @Data d ON d.ParentID = cte.ID ) SELECT d.ID, d.ParentID, d.Text, d.Price, cnt.Children FROM @Data d INNER JOIN ( SELECT ID = RootID, Children = COUNT(*) - 1 FROM ChildrenCTE GROUP BY RootID ) cnt ON cnt.ID = d.ID
Try to group by Event_Key in your subquery. from Child c . where c.eventkey = p.eventkey . group by p.eventkey. It might help to show the entire query, but I suggest a CTE rather than a subquery.
14 lip 2013 · SELECT parent.id , COUNT(child.id) AS child_count FROM messages parent INNER JOIN messages child ON child.parent_id = parent.id WHERE parent.parent_id = 0 GROUP BY parent.id; You can see this code in action here on SQL Fiddle .
Here we use the COUNT() function and the GROUP BY clause, to return the number of records for each category in the Products table: Example SELECT COUNT(*) AS [Number of records], CategoryID
16 mar 2023 · Learn the variations of the SQL COUNT() function: count(*), count(1), count(column name), and count(distinct).
7 wrz 2023 · In SQL, combining the COUNT () function with the OVER () clause and PARTITION BY opens the door to a totally different way to count rows. In this article, you’ll learn how to do several COUNTs in a single query and calculate expressions based on the result of the COUNT function.
29 cze 2023 · Using the COUNT () function with GROUP BY is one of the most common SQL constructs in aggregate queries. Read this article to find out how to use COUNT () with GROUP BY correctly using 5 examples. In this article, we will explain the importance of using COUNT with GROUP BY.
