Merge pull request rails#28208 from yahonda/rails28183_oracle

Oracle database also does not allow aliases in the having clause

Author: pixeltrix

activerecord/test/cases/calculations_test.rb

@@ -249,7 +249,7 @@ def test_should_group_by_summed_field_having_condition
   end
 
   def test_should_group_by_summed_field_having_condition_from_select
-    skip if current_adapter?(:PostgreSQLAdapter)
+    skip if current_adapter?(:PostgreSQLAdapter, :OracleAdapter)
     c = Account.select("MIN(credit_limit) AS min_credit_limit").group(:firm_id).having("min_credit_limit > 50").sum(:credit_limit)
     assert_nil       c[1]
     assert_equal 60, c[2]