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 …
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.
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 …
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 …
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 …
SQL Server Pivot Table with multiple column aggregates
I would do this slightly different by applying both the UNPIVOT and the PIVOT functions to get the final result. The unpivot takes the values from both the totalcount and totalamount columns …
Aggregate on datetime in sql with group by - Stack Overflow
Jun 24, 2016 · The following are available aggregate functions for SQL AVG() - Returns the average value COUNT() - Returns the number of rows FIRST() - Returns the first value …
sql - How to aggregate boolean column - Stack Overflow
Jun 21, 2016 · Mysql / Mariadb also have BIT_AND and BIT_OR aggregate functions which you can apply to columns of boolean values. Postgres has BOOL_AND and BOOL_OR. I think it …
Aggregate SQL Function to grab only the first from each group
Apr 21, 2017 · 2 First and Last do not exist in Sql Server 2005 or 2008, but in Sql Server 2012 there is a First_Value, Last_Value function. I tried to implement the aggregate First and Last …
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 …