Sql use aggregate function in where clause

SQL Aggregate Functions

Simon Martin 2,972 7 46 80. To get the maximum units in stock of products in the products table, you use the MAX function as shown in the following query:. It is therefore possible that another user may be performing a transaction that modifies the data while an aggregate calculation is in process.

sql use aggregate function in where clause

Perfect answer. The default is to perform the aggregate operation on all non-NULL values, including duplicate values. You haven't mentioned the DBMS. Just what I needed to know and understand.

sql use aggregate function in where clause

An aggregate function can be used in:. Aggregate functions ignore fields that are NULL.

sql use aggregate function in where clause

Show all customer ids and number of orders for those who have 5 or more orders and NULL for others: The current state of uncommitted data is as follows:. It would be interesting, if anyone else could check for other SQL implementations.

sql use aggregate function in where clause

Thank you! MIN unitsinstock. Jason Goemaat Jason Goemaat 21.

Use HAVING and WHERE Clauses in the Same Query (Visual Database Tools)

Bhullar Nov 29 '13 at 18: Post Your Answer Discard By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Next Tutorial: But my answer was marked false and now I want to know in which cases it is possible to use an aggregate function in the WHERE.

sql use aggregate function in where clause

Check it out the MAX function tutorial for more information. Aggregate functions are not evaluated:. No idea when various products added the functionality. Samir Lakhani Samir Lakhani 44 6. I think it's a definition thing. Introduction to SQL aggregate functions An aggregate function allows you to perform a calculation on a set of values to return a single scalar value. In this tutorial, we have introduced you to the SQL aggregate functions including the most commonly used functions: I know it is possible as subquery, but i'm not sure if then i can say i can use an aggregat function in the WHERE...

An aggregate function allows you to perform a calculation on a set of values to return a single scalar value.