导航属性规则制约、ISelect 增加 AsSelect 用于集合属性进行子查询，自动联表查询，以及MySql实现与部分测试

FreeSql.Tests/Oracle/OracleExpression/MathTest.cs

@@ -14,7 +14,7 @@ namespace FreeSql.Tests.OracleExpression {
 			[Column(IsIdentity = true, IsPrimary = true)]
 			public int Id { get; set; }
 			public int Clicks { get; set; }
-			public int TestTypeInfoGuid { get; set; }
+			public int TypeGuid { get; set; }
 			public TestTypeInfo Type { get; set; }
 			public string Title { get; set; }
 			public DateTime CreateTime { get; set; }