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 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 …
Aggregate function in SQL WHERE-Clause - Stack Overflow
May 13, 2014 · In a test at university there was a question; is it possible to use an aggregate function in the SQL WHERE clause. I always thought this isn't possible and I also can't find any example how it …
What is the difference between PARTITION BY and GROUP BY
The SQL GROUP BY clause can be used in a SELECT statement to collect data across multiple records and group the results by one or more columns. In more simple words GROUP BY statement is used …
Why do we need GROUP BY with AGGREGATE FUNCTIONS?
Dec 22, 2012 · 4 If you don't specify GROUP BY, aggregate functions operate over all the records selected. In that case, it doesn't make sense to also select a specific column like EmployeeID.
sql - TSQL Pivot without aggregate function - Stack Overflow
sql parameterised cte query The answer to that question involves a situation where pivot without aggregation is needed so an example of doing it is part of the solution.
sql - Why can't you mix Aggregate values and Non-Aggregate values …
Jan 19, 2013 · The aggregate function and the group by clause aren't separate things, they're parts of the same thing that appear in different places in the query. If you wish to aggregate on a column, you …
sql - must appear in the GROUP BY clause or be used in an aggregate ...
Oct 26, 2013 · ERROR: column "makerar.wmname" must appear in the GROUP BY clause or be used in an aggregate function LINE 1: SELECT cname, wmname, MAX(avg) FROM makerar GROUP BY …
sql - GROUP BY without aggregate function - Stack Overflow
Nov 19, 2013 · Functionally, if you use GROUP BY with no Aggregate functions in the select, you are just doing a DISTINCT. Oracle seems to use different methods for each, but it ends with the same …
select - SQL: How to filter after aggregation? - Stack Overflow
Apr 2, 2013 · SELECT department, SUM(sales) as "Total sales" FROM order_details GROUP BY department HAVING SUM(sales) > 1000; Which will exclude all sales with a value less than or equal …