I'm attempting to execute the following query and I get the above error. Any ideas?
session.CreateQuery("SELECT SUM(NumberHead) AS numberhead " +
"FROM Purchase "
+"INNER JOIN Lot "
+ "ON Purchase.FeedLot = Lot.Id "
+ "WHERE Purchase.CohortState = 0").List();
try this
SELECT SUM(purchase.NumberHead) AS numberhead FROM Purchase purchase INNER JOIN Lot lot ON purchase.FeedLot = lot.Id WHERE purchase.CohortState = 0