Include equal or greater than correctly sql

Question

I'm trying to add an equal or greater than 20.0 parameter in this sql statement called from a JSP template, however it's giving me sql syntax error all the time near the HAVING sum(amount):

 "SELECT performId,sum(amount) AS totalAmount FROM performTransactions"+ 
 " WHERE  time >= STR_TO_DATE('" + (ftd.format(timeFrom)) + "', '%Y.%m.%d %H:%i:%s')" + 
 " AND time < STR_TO_DATE('" + (ftd.format(timeTo)) + "', '%Y.%m.%d %H:%i:%s')" + 
 " AND type IN (1, 2)  GROUP BY performId ORDER BY totalAmount DESC" + 
 " HAVING sum(amount) >= 20.0" ;

I tried to include the parameter in a different position, but it was sending "invalid use of group function", how can I set correctly sum(amount) or totalAmount greater than 20.0 correctly? Thank you

Answer 1

HAVING comes before ORDER BY:

"SELECT performId,sum(amount) AS totalAmount FROM performTransactions"+ 
 " WHERE  time >= STR_TO_DATE('" + (ftd.format(timeFrom)) + "', '%Y.%m.%d %H:%i:%s')" + 
 " AND time < STR_TO_DATE('" + (ftd.format(timeTo)) + "', '%Y.%m.%d %H:%i:%s')" + 
 " AND type IN (1, 2)  GROUP BY performId " + 
 " HAVING sum(amount) >= 20.0" 
 " ORDER BY totalAmount DESC";