diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/CodeFirstProvider/TableDifferenceProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/CodeFirstProvider/TableDifferenceProvider.cs
index 823ab625f..753c45c41 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/CodeFirstProvider/TableDifferenceProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/CodeFirstProvider/TableDifferenceProvider.cs
@@ -58,6 +58,8 @@ namespace SqlSugar
             foreach (var tableInfo in tableInfos)
             {
                 TableDifferenceInfo addItem = new TableDifferenceInfo();
+                if (tableInfo.OldTableInfo == null)
+                    tableInfo.OldTableInfo = new DbTableInfo();
                 addItem.TableName = tableInfo.OldTableInfo.Name;
                 addItem.AddColums = GetAddColumn(tableInfo);
                 addItem.UpdateColums = GetUpdateColumn(tableInfo);
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/LogicDeleteProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/LogicDeleteProvider.cs
index 05d46a1fa..a8c677530 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/LogicDeleteProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/LogicDeleteProvider.cs
@@ -31,6 +31,36 @@ namespace SqlSugar
             var result = updateable.Where(where).ExecuteCommand();
             return result;
         }
+        public int ExecuteCommand(string LogicFieldName, object deleteValue, string deleteTimeFieldName,string userNameFieldName,object userNameValue)
+        {
+            ISqlSugarClient db;
+            List<SugarParameter> pars;
+            string where;
+            LogicFieldName = _ExecuteCommand(LogicFieldName, out db, out where, out pars);
+            var updateable = db.Updateable<T>().SetColumns(LogicFieldName, deleteValue);
+            updateable.SetColumns(deleteTimeFieldName, DateTime.Now);
+            updateable.SetColumns(userNameFieldName,userNameValue);
+            if (pars != null)
+                updateable.UpdateBuilder.Parameters.AddRange(pars);
+            Convert(updateable as UpdateableProvider<T>);
+            var result = updateable.Where(where).ExecuteCommand();
+            return result;
+        }
+        public async Task<int> ExecuteCommandAsync(string LogicFieldName, object deleteValue, string deleteTimeFieldName, string userNameFieldName, object userNameValue)
+        {
+            ISqlSugarClient db;
+            List<SugarParameter> pars;
+            string where;
+            LogicFieldName = _ExecuteCommand(LogicFieldName, out db, out where, out pars);
+            var updateable = db.Updateable<T>().SetColumns(LogicFieldName, deleteValue);
+            updateable.SetColumns(deleteTimeFieldName, DateTime.Now);
+            updateable.SetColumns(userNameFieldName, userNameValue);
+            if (pars != null)
+                updateable.UpdateBuilder.Parameters.AddRange(pars);
+            Convert(updateable as UpdateableProvider<T>);
+            var result =await updateable.Where(where).ExecuteCommandAsync();
+            return result;
+        }
         public async Task<int> ExecuteCommandAsync(string LogicFieldName = null, object deleteValue = null, string deleteTimeFieldName = null)
         {
             ISqlSugarClient db;
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index 7f25f6404..be146509a 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -423,6 +423,25 @@ namespace SqlSugar
         {
             return WhereColumns(new List<Dictionary<string, object>> { dictionary });
         }
+        public ISugarQueryable<T> WhereColumns(Dictionary<string, object> columns, bool ignoreDefaultValue) 
+        {
+            if (ignoreDefaultValue == false || columns == null)
+            {
+                return WhereColumns(columns);
+            }
+            else 
+            {
+                var newColumns = new Dictionary<string, object>();
+                foreach (var item in columns)
+                {
+                    if (!UtilMethods.IsDefaultValue(item.Value)) 
+                    {
+                        newColumns.Add(item.Key, item.Value);
+                    }
+                }
+                return WhereColumns(newColumns);
+            }
+        }
         public ISugarQueryable<T> WhereColumns(List<Dictionary<string, object>> list)
         {
             List<IConditionalModel> conditionalModels = new List<IConditionalModel>();
diff --git a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
index d95f989e5..2acdbc538 100644
--- a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
@@ -54,6 +54,7 @@ namespace SqlSugar
         ISugarQueryable<T> WhereClassByPrimaryKey(List<T> list);
         ISugarQueryable<T> WhereClassByPrimaryKey(T data) ;
         ISugarQueryable<T> WhereColumns(List<Dictionary<string, object>> columns);
+        ISugarQueryable<T> WhereColumns(Dictionary<string, object> columns, bool ignoreDefaultValue);
         ISugarQueryable<T> WhereColumns(Dictionary<string, object> columns);
         ISugarQueryable<T> TranLock(DbLockType LockType = DbLockType.Wait);
         ISugarQueryable<T> Where(Expression<Func<T, bool>> expression);
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/PostgreSQLProvider.cs b/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/PostgreSQLProvider.cs
index 41ac202f6..8beecd478 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/PostgreSQLProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/PostgreSQLProvider.cs
@@ -153,6 +153,10 @@ namespace SqlSugar
                 {
                     sqlParameter.DbType = System.Data.DbType.AnsiString;
                 }
+                else if (sqlParameter.Value is DateTime && sqlParameter.DbType == System.Data.DbType.AnsiString) 
+                {
+                    sqlParameter.DbType = System.Data.DbType.DateTime;
+                }
                 ++index;
             }
             return result;
diff --git a/Src/Asp.NetCore2/SqlSugar/SqlSugar.csproj b/Src/Asp.NetCore2/SqlSugar/SqlSugar.csproj
index 80d278940..489970460 100644
--- a/Src/Asp.NetCore2/SqlSugar/SqlSugar.csproj
+++ b/Src/Asp.NetCore2/SqlSugar/SqlSugar.csproj
@@ -14,11 +14,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Compile Remove="Abstract\AdoProvider\Abstract\**" />
     <Compile Remove="dll\**" />
-    <EmbeddedResource Remove="Abstract\AdoProvider\Abstract\**" />
     <EmbeddedResource Remove="dll\**" />
-    <None Remove="Abstract\AdoProvider\Abstract\**" />
     <None Remove="dll\**" />
   </ItemGroup>
 
diff --git a/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs b/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
index 365f6fc22..196885c6b 100644
--- a/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
@@ -17,6 +17,12 @@ namespace SqlSugar
     public class UtilMethods
     {
 
+        internal static bool IsDefaultValue(object value)
+        {
+            if (value == null) return true;
+            return value.Equals(UtilMethods.GetDefaultValue(value.GetType()));
+        }
+
         internal static DateTime ConvertFromDateTimeOffset(DateTimeOffset dateTime)
         {
             if (dateTime.Offset.Equals(TimeSpan.Zero))