diff --git a/FreeSql/Internal/CommonProvider/InsertProvider.cs b/FreeSql/Internal/CommonProvider/InsertProvider.cs
index e8bb406e..3abd94b2 100644
--- a/FreeSql/Internal/CommonProvider/InsertProvider.cs
+++ b/FreeSql/Internal/CommonProvider/InsertProvider.cs
@@ -548,6 +548,7 @@ namespace FreeSql.Internal.CommonProvider
                     else
                     {
                         object val = col.GetMapValue(d);
+                        if (val == null && col.Attribute.IsNullable == false) val = Utils.GetDataReaderValue(col.CsType.NullableTypeOrThis(), null);//#384
                         if (_noneParameter)
                             sb.Append(_commonUtils.GetNoneParamaterSqlValue(specialParams, col.Attribute.MapType, val));
                         else
diff --git a/Providers/FreeSql.Provider.Dameng/Curd/DamengInsert.cs b/Providers/FreeSql.Provider.Dameng/Curd/DamengInsert.cs
index addd7d09..643da775 100644
--- a/Providers/FreeSql.Provider.Dameng/Curd/DamengInsert.cs
+++ b/Providers/FreeSql.Provider.Dameng/Curd/DamengInsert.cs
@@ -67,6 +67,7 @@ namespace FreeSql.Dameng.Curd
                     else
                     {
                         object val = col.GetMapValue(d);
+                        if (val == null && col.Attribute.IsNullable == false) val = Utils.GetDataReaderValue(col.CsType.NullableTypeOrThis(), null);//#384
                         if (_noneParameter)
                             sb.Append(_commonUtils.GetNoneParamaterSqlValue(specialParams, col.Attribute.MapType, val));
                         else
diff --git a/Providers/FreeSql.Provider.Odbc/Dameng/Curd/OdbcDamengInsert.cs b/Providers/FreeSql.Provider.Odbc/Dameng/Curd/OdbcDamengInsert.cs
index 01bb6ae5..da81f57b 100644
--- a/Providers/FreeSql.Provider.Odbc/Dameng/Curd/OdbcDamengInsert.cs
+++ b/Providers/FreeSql.Provider.Odbc/Dameng/Curd/OdbcDamengInsert.cs
@@ -67,6 +67,7 @@ namespace FreeSql.Odbc.Dameng
                     else
                     {
                         object val = col.GetMapValue(d);
+                        if (val == null && col.Attribute.IsNullable == false) val = Utils.GetDataReaderValue(col.CsType.NullableTypeOrThis(), null);//#384
                         if (_noneParameter)
                             sb.Append(_commonUtils.GetNoneParamaterSqlValue(specialParams, col.Attribute.MapType, val));
                         else
diff --git a/Providers/FreeSql.Provider.Odbc/Oracle/Curd/OdbcOracleInsert.cs b/Providers/FreeSql.Provider.Odbc/Oracle/Curd/OdbcOracleInsert.cs
index 0f2af13a..cb49ddf8 100644
--- a/Providers/FreeSql.Provider.Odbc/Oracle/Curd/OdbcOracleInsert.cs
+++ b/Providers/FreeSql.Provider.Odbc/Oracle/Curd/OdbcOracleInsert.cs
@@ -67,6 +67,7 @@ namespace FreeSql.Odbc.Oracle
                     else
                     {
                         object val = col.GetMapValue(d);
+                        if (val == null && col.Attribute.IsNullable == false) val = Utils.GetDataReaderValue(col.CsType.NullableTypeOrThis(), null);//#384
                         if (_noneParameter)
                             sb.Append(_commonUtils.GetNoneParamaterSqlValue(specialParams, col.Attribute.MapType, val));
                         else
diff --git a/Providers/FreeSql.Provider.Oracle/Curd/OracleInsert.cs b/Providers/FreeSql.Provider.Oracle/Curd/OracleInsert.cs
index bf9c9902..98117dc5 100644
--- a/Providers/FreeSql.Provider.Oracle/Curd/OracleInsert.cs
+++ b/Providers/FreeSql.Provider.Oracle/Curd/OracleInsert.cs
@@ -69,6 +69,7 @@ namespace FreeSql.Oracle.Curd
                     else
                     {
                         object val = col.GetMapValue(d);
+                        if (val == null && col.Attribute.IsNullable == false) val = Utils.GetDataReaderValue(col.CsType.NullableTypeOrThis(), null);//#384
                         if (_noneParameter)
                             sb.Append(_commonUtils.GetNoneParamaterSqlValue(specialParams, col.Attribute.MapType, val));
                         else