MySQL using Sum and Case

Question

I\'m trying to create a GridView with ASP.NET connecting to a MySQL database. The data appears like below.

BusinessUnit    OrderDate      Canceled
UnitA             


        

Answer 1

The error is caused by the space between function name and parenthesis

SUM (CASE WHEN ...
   ^^

Read more Function Name Parsing and Resolution

Try

SELECT BusinessUnit,
       SUM(CASE WHEN OrderDate = CURDATE() THEN 1 ELSE 0 END) TodaysOrders,
       SUM(CASE WHEN DATE_FORMAT(OrderDate, '%Y%m') = DATE_FORMAT(CURDATE(), '%Y%m') THEN 1 ELSE 0 END) ThisMonthsOrders,
       SUM(CASE WHEN YEAR(OrderDate) = YEAR(CURDATE()) THEN 1 ELSE 0 END) ThisYearsOrders
  FROM OrderTable
 WHERE Canceled <> 'Y'
 GROUP BY BusinessUnit

Here is SQLFiddle demo