sql - Query with aggregate functions is very slow - Stack Overflow
Sep 9, 2025 · Query with aggregate functions is very slow Asked 5 months ago Modified 5 months ago Viewed 162 times
SQL GROUP BY CASE statement with aggregate function
And I would like to put it in my GROUP BY clause, but this seems to cause problems because there is an aggregate function in column. Is there a way to GROUP BY a column alias such as some_product …
Why is there no PRODUCT aggregate function in SQL?
Oct 12, 2010 · Out of interest, there is indeed demand in SQL Server Land for new set functions but for those of the window function variety (and Standard SQL, too). For more details, including how to get …
Is there really no First/Last aggregate function in T-SQL?
Aug 24, 2023 · 3 Is there really no First/Last aggregate function in T-SQL? No - there are no such aggregate functions in TSQL. The problem with FIRST and LAST is that you need a way of …
sql - ERROR: Aggregate window functions with an ORDER BY clause …
Jan 10, 2022 · I am getting an 'ERROR: Aggregate window functions with an ORDER BY clause require a frame clause' message when enterring the following query on Redshift. Please help - I am trying to …
Why are aggregate functions not allowed in where clause
34 Why can't we use aggregate function in where clause Aggregate functions work on sets of data. A WHERE clause doesn't have access to entire set, but only to the row that it is currently working on. …
sql - Is it possible to use Aggregate function in a Select statment ...
Jun 24, 2011 · When we use Aggregate functions what are the columns I need to specify in the Group By clause. Otherwise Is there any way to use Aggregate functions without using Group By clause.
How do I select columns together with aggregate functions?
Jun 23, 2012 · If I change the WHERE to HAVING because of the aggregate functions, I get errors telling me to remove each of the other column names that aren't contained in either an aggregate …
How to avoid error "aggregate functions are not allowed in WHERE"
Jan 8, 2014 · This sql code throws an aggregate functions are not allowed in WHERE SELECT o.ID , count (p.CAT) FROM Orders o INNER JOIN Products p ON o.P_ID = p.P_ID WHERE count (p.CAT) …
sql - Why can't you mix Aggregate values and Non-Aggregate values …
If you use an aggregate, but doesn't specify any grouping, the query will still be grouped, and the entire result is a single group. So the query select count(*) from Person will create a single group …