Optimized update single row

Src/Asp.Net/SqlServerTest/Demos/2_Update.cs

@@ -24,7 +24,7 @@ namespace OrmTest.Demo
 
             //Only  update  Name 
             var t3 = db.Updateable(updateObj).UpdateColumns(it => new { it.Name }).ExecuteCommand();
-            var t3_1 = db.Updateable(updateObj).UpdateColumns(it => it=="Name").ExecuteCommand();
+            var t3_1 = db.Updateable(updateObj).UpdateColumns(it => it == "Name").ExecuteCommand();
 
 
             //Ignore  Name and TestId
@@ -60,8 +60,11 @@ namespace OrmTest.Demo
             db.Updateable(updateObj).Where(true).ExecuteCommand();
 
 
-           var t12= db.Updateable<School>().AS("Student").UpdateColumns(it => new School() { Name = "jack" }).Where(it => it.Id == 1).ExecuteCommandAsync();
+            var t12 = db.Updateable<School>().AS("Student").UpdateColumns(it => new School() { Name = "jack" }).Where(it => it.Id == 1).ExecuteCommandAsync();
             t12.Wait();
+
+            //update one columns
+            var count= db.Updateable<Student>().UpdateColumns(it => it.SchoolId == 1).Where(it => it.Id == 1).ExecuteCommand();
         }
     }
 }

Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs

@@ -52,7 +52,7 @@ namespace SqlSugar
             Task<bool> result = new Task<bool>(() =>
             {
                 IUpdateable<T> asyncUpdateable = CopyUpdateable();
-                return asyncUpdateable.ExecuteCommand()>0;
+                return asyncUpdateable.ExecuteCommand() > 0;
             });
             result.Start();
             return result;
@@ -125,7 +125,19 @@ namespace SqlSugar
                     item.IsPrimarykey = true;
                 }
             }
-            this.UpdateBuilder.DbColumnInfoList = this.UpdateBuilder.DbColumnInfoList.Where(it => updateColumns.Any(uc=>uc.Equals(it.PropertyName,StringComparison.CurrentCultureIgnoreCase)) || it.IsPrimarykey || it.IsIdentity).ToList();
+            this.UpdateBuilder.DbColumnInfoList = this.UpdateBuilder.DbColumnInfoList.Where(it => updateColumns.Any(uc => uc.Equals(it.PropertyName, StringComparison.CurrentCultureIgnoreCase)) || it.IsPrimarykey || it.IsIdentity).ToList();
+            return this;
+        }
+
+        public IUpdateable<T> UpdateColumns(Expression<Func<T, bool>> columns) {
+            var binaryExp = columns.Body as BinaryExpression;
+            Check.Exception(!binaryExp.NodeType.IsIn(ExpressionType.Equal), "No support {0}", columns.ToString());
+            Check.Exception(!(binaryExp.Left is MemberExpression), "No support {0}", columns.ToString());
+            Check.Exception(ExpressionTool.IsConstExpression(binaryExp.Left as MemberExpression), "No support {0}", columns.ToString());
+            var expResult = UpdateBuilder.GetExpressionValue(columns, ResolveExpressType.WhereSingle).GetResultString().Trim().TrimStart('(').TrimEnd(')');
+            string key = SqlBuilder.GetNoTranslationColumnName(expResult);
+            UpdateBuilder.SetValues.Add(new KeyValuePair<string, string>(SqlBuilder.GetTranslationColumnName(key), expResult));
+            this.UpdateBuilder.DbColumnInfoList = this.UpdateBuilder.DbColumnInfoList.Where(it => UpdateBuilder.SetValues.Any(v => SqlBuilder.GetNoTranslationColumnName(v.Key).Equals(it.DbColumnName, StringComparison.CurrentCultureIgnoreCase) || SqlBuilder.GetNoTranslationColumnName(v.Key).Equals(it.PropertyName, StringComparison.CurrentCultureIgnoreCase)) || it.IsPrimarykey == true).ToList();
             return this;
         }
 

Src/Asp.Net/SqlSugar/Interface/IUpdateable.cs

@@ -25,6 +25,7 @@ namespace SqlSugar
         /// <returns></returns>
         IUpdateable<T> WhereColumns(Expression<Func<T, object>> columns);
         IUpdateable<T> UpdateColumns(Expression<Func<T, object>> columns);
+        IUpdateable<T> UpdateColumns(Expression<Func<T, bool>> columns);
         IUpdateable<T> UpdateColumns(Func<string, bool> updateColumMethod);
         IUpdateable<T> UpdateColumns(Expression<Func<T, T>> columns);
         IUpdateable<T> IgnoreColumns(Expression<Func<T, object>> columns);