- 修复 Oracle 表达式 DateTime.Subtract(DateTime) 解析 bug；

FreeSql.Tests/FreeSql.Tests/UnitTest1.cs

@@ -341,6 +341,9 @@ namespace FreeSql.Tests
         [Fact]
         public void Test1()
         {
+            var kfkfjdfg = g.oracle.Select<Templates>().Where(a => (DateTime.Now - a.EditTime).TotalMinutes > 100).ToSql();
+
+
             g.oracle.Aop.SyncStructureAfter += (s, e) => 
                 Trace.WriteLine(e.Sql);
 

Providers/FreeSql.Provider.Oracle/OracleExpression.cs

@@ -378,7 +378,7 @@ namespace FreeSql.Oracle
                     case "Subtract":
                         switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName)
                         {
-                            case "System.DateTime": return $"({args1}-{left})";
+                            case "System.DateTime": return $"numtodsinterval(({left}+0)-({args1}+0),'day')";
                             case "System.TimeSpan": return $"({left}-{args1})";
                         }
                         break;