diff --git a/OrmTest/UnitTest/Update.cs b/OrmTest/UnitTest/Update.cs
index c95eb9d58..541829f98 100644
--- a/OrmTest/UnitTest/Update.cs
+++ b/OrmTest/UnitTest/Update.cs
@@ -47,11 +47,15 @@ namespace OrmTest.UnitTest
                 .UpdateColumns(it => new { it.Name }).ToSql();
 
             //update List<T>
-            var s8 = db.Updateable(updateObj).With(SqlWith.UpdLock).ToSql();
+            var s8 = db.Updateable(updateObjs).With(SqlWith.UpdLock).ToSql();
 
             //Re Set Value
             var s9 = db.Updateable(updateObj)
                 .ReSetValue(it=>it.Name==(it.SchoolId+"")).ToSql();
+
+            //Where By Expression
+            var s10 = db.Updateable(updateObj)
+           .Where(it => it.Id==1).ToSql();
         }
 
         public SqlSugarClient GetInstance()
diff --git a/SqlSugar/Interface/IUpdateable.cs b/SqlSugar/Interface/IUpdateable.cs
index cdd935e91..8eeac9ea7 100644
--- a/SqlSugar/Interface/IUpdateable.cs
+++ b/SqlSugar/Interface/IUpdateable.cs
@@ -13,11 +13,13 @@ namespace SqlSugar
         IUpdateable<T> With(string lockString);
         IUpdateable<T> Update(T InsertObj);
         IUpdateable<T> Where(bool isUpdateNull);
+        IUpdateable<T> Where(Expression<Func<T, bool>> expression);
         IUpdateable<T> UpdateColumns(Expression<Func<T, object>> columns);
         IUpdateable<T> IgnoreColumns(Expression<Func<T, object>> columns);
         IUpdateable<T> IgnoreColumns(Func<string, bool> ignoreColumMethod);
         IUpdateable<T> ReSetValue(Expression<Func<T, bool>> setValueExpression);
         IUpdateable<T> UpdateRange(List<T> InsertObjs);
         KeyValuePair<string,List<SugarParameter>> ToSql();
+        object Where(Func<object, bool> p);
     }
 }