update

多表查询.md

@@ -114,6 +114,15 @@ sql = select.From<TestTypeInfo, TestTypeParentInfo>((s, b, c) => s
 //WHERE (a.`Id` = 10 AND c.`Name` = 'xxx') AND (b.`ParentId` = 20)
 ```
 
+或者
+
+```csharp
+sql = fsql.Select<Topic, TestTypeInfo, TestTypeParentInfo>()
+    .Where((a, b, c) => a.Id == 10 && c.Name == "xxxx")
+    .Where((a, b, c) => b.ParentId == 20)
+    .ToSql();
+```
+
 ## 子表 Exists
 ```csharp
 var sql2222 = select.Where(a => select.Where(b => b.Id == a.Id).Any()).ToList();