SQL - using alias in Group By

Question

Just curious about SQL syntax. So if I have

SELECT 
 itemName as ItemName,
 substring(itemName, 1,1) as FirstLetter,
 Count(itemName)
FROM table1
GROUP BY it         


        

Answer 1

Beware of using aliases when grouping the results from a view in SQLite. You will get unexpected results if the alias name is the same as the column name of any underlying tables (to the views.)