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.
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.
An aggregate function can be used in:. Aggregate functions ignore fields that are NULL.
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.
Thank you! MIN unitsinstock. Jason Goemaat Jason Goemaat 21.
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.