diff --git a/Arch.Data/Arch.Data/Common/Util/ParameterUtility.cs b/Arch.Data/Arch.Data/Common/Util/ParameterUtility.cs
index d6249f994..5dcc1d57c 100644
--- a/Arch.Data/Arch.Data/Common/Util/ParameterUtility.cs
+++ b/Arch.Data/Arch.Data/Common/Util/ParameterUtility.cs
@@ -1,6 +1,5 @@
 using Arch.Data.Common.constant;
 using Arch.Data.DbEngine;
-using Arch.Data.Exceptions;
 using System;
 using System.Collections;
 using System.Data;
diff --git a/Arch.Data/Arch.Data/Common/Util/ShardingUtil.cs b/Arch.Data/Arch.Data/Common/Util/ShardingUtil.cs
index 430a5f48c..54656ea15 100644
--- a/Arch.Data/Arch.Data/Common/Util/ShardingUtil.cs
+++ b/Arch.Data/Arch.Data/Common/Util/ShardingUtil.cs
@@ -2,7 +2,6 @@
 using Arch.Data.Common.Enums;
 using Arch.Data.DbEngine;
 using Arch.Data.DbEngine.Sharding;
-using Arch.Data.Exceptions;
 using Arch.Data.Orm.sql;
 using System;
 using System.Collections;
diff --git a/Arch.Data/Arch.Data/Dao/BaseDao.cs b/Arch.Data/Arch.Data/Dao/BaseDao.cs
index cad1b0b2c..ac53b44d2 100644
--- a/Arch.Data/Arch.Data/Dao/BaseDao.cs
+++ b/Arch.Data/Arch.Data/Dao/BaseDao.cs
@@ -4,7 +4,6 @@
 using Arch.Data.DbEngine;
 using Arch.Data.DbEngine.DB;
 using Arch.Data.DbEngine.Sharding;
-using Arch.Data.Exceptions;
 using Arch.Data.Orm;
 using Arch.Data.Orm.partially;
 using Arch.Data.Orm.sql;
diff --git a/Arch.Data/Arch.Data/Dao/MySqlDialectDao.cs b/Arch.Data/Arch.Data/Dao/MySqlDialectDao.cs
index 5c39d5058..7cb5c35aa 100644
--- a/Arch.Data/Arch.Data/Dao/MySqlDialectDao.cs
+++ b/Arch.Data/Arch.Data/Dao/MySqlDialectDao.cs
@@ -1,7 +1,6 @@
 using Arch.Data.Common.Util;
 using Arch.Data.DbEngine;
 using Arch.Data.DbEngine.DB;
-using Arch.Data.Exceptions;
 using Arch.Data.Orm.partially;
 using Arch.Data.Orm.sql;
 using System;
diff --git a/Arch.Data/Arch.Data/DbEngine/Connection/TransactionConnectionManager.cs b/Arch.Data/Arch.Data/DbEngine/Connection/TransactionConnectionManager.cs
index deb9530d6..07c1ef15d 100644
--- a/Arch.Data/Arch.Data/DbEngine/Connection/TransactionConnectionManager.cs
+++ b/Arch.Data/Arch.Data/DbEngine/Connection/TransactionConnectionManager.cs
@@ -1,5 +1,4 @@
 using Arch.Data.DbEngine.DB;
-using Arch.Data.Exceptions;
 using System;
 using System.Collections.Concurrent;
 using System.Data.Common;
diff --git a/Arch.Data/Arch.Data/DbEngine/DALBootstrap.cs b/Arch.Data/Arch.Data/DbEngine/DALBootstrap.cs
index 95e034517..d65511e8a 100644
--- a/Arch.Data/Arch.Data/DbEngine/DALBootstrap.cs
+++ b/Arch.Data/Arch.Data/DbEngine/DALBootstrap.cs
@@ -6,7 +6,6 @@
 using Arch.Data.DbEngine.DB;
 using Arch.Data.DbEngine.Providers;
 using Arch.Data.DbEngine.Sharding;
-using Arch.Data.Exceptions;
 using Arch.Data.Properties;
 using System;
 using System.Collections.Generic;
diff --git a/Arch.Data/Arch.Data/DbEngine/DB/DatabaseBridge.cs b/Arch.Data/Arch.Data/DbEngine/DB/DatabaseBridge.cs
index acac23d24..3d6ccd4c9 100644
--- a/Arch.Data/Arch.Data/DbEngine/DB/DatabaseBridge.cs
+++ b/Arch.Data/Arch.Data/DbEngine/DB/DatabaseBridge.cs
@@ -1,7 +1,6 @@
 using Arch.Data.Common.Util;
 using Arch.Data.Common.Vi;
 using Arch.Data.DbEngine.HA;
-using Arch.Data.Exceptions;
 using Arch.Data.Properties;
 using System;
 using System.Data;
diff --git a/Arch.Data/Arch.Data/DbEngine/HA/AbstractHA.cs b/Arch.Data/Arch.Data/DbEngine/HA/AbstractHA.cs
index 4cb173aed..fc3ff16ff 100644
--- a/Arch.Data/Arch.Data/DbEngine/HA/AbstractHA.cs
+++ b/Arch.Data/Arch.Data/DbEngine/HA/AbstractHA.cs
@@ -1,7 +1,6 @@
 using Arch.Data.Common.Util;
 using Arch.Data.Common.Vi;
 using Arch.Data.DbEngine.DB;
-using Arch.Data.Exceptions;
 using Arch.Data.Properties;
 using System;
 using System.Collections;
diff --git a/Arch.Data/Arch.Data/DbEngine/MarkDown/MySqlTimeoutMarkDown.cs b/Arch.Data/Arch.Data/DbEngine/MarkDown/MySqlTimeoutMarkDown.cs
index 9e0bd51dd..8a06427b1 100644
--- a/Arch.Data/Arch.Data/DbEngine/MarkDown/MySqlTimeoutMarkDown.cs
+++ b/Arch.Data/Arch.Data/DbEngine/MarkDown/MySqlTimeoutMarkDown.cs
@@ -1,5 +1,4 @@
 using Arch.Data.Common.Util;
-using Arch.Data.Exceptions;
 using System;
 using System.Data.Common;
 
diff --git a/Arch.Data/Arch.Data/DbEngine/MarkDown/SqlServerTimeoutMarkDown.cs b/Arch.Data/Arch.Data/DbEngine/MarkDown/SqlServerTimeoutMarkDown.cs
index fee928737..cb94acd8e 100644
--- a/Arch.Data/Arch.Data/DbEngine/MarkDown/SqlServerTimeoutMarkDown.cs
+++ b/Arch.Data/Arch.Data/DbEngine/MarkDown/SqlServerTimeoutMarkDown.cs
@@ -1,5 +1,4 @@
 using Arch.Data.Common.Util;
-using Arch.Data.Exceptions;
 using System;
 using System.Collections.Generic;
 using System.Data.Common;
diff --git a/Arch.Data/Arch.Data/DbEngine/Sharding/ExecuteParallelHelper.cs b/Arch.Data/Arch.Data/DbEngine/Sharding/ExecuteParallelHelper.cs
index ef73b23de..be144820b 100644
--- a/Arch.Data/Arch.Data/DbEngine/Sharding/ExecuteParallelHelper.cs
+++ b/Arch.Data/Arch.Data/DbEngine/Sharding/ExecuteParallelHelper.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using System.Transactions;
diff --git a/Arch.Data/Arch.Data/DbEngine/Sharding/ModShardingStrategy.cs b/Arch.Data/Arch.Data/DbEngine/Sharding/ModShardingStrategy.cs
index 87d00ce4a..d2c9afef4 100644
--- a/Arch.Data/Arch.Data/DbEngine/Sharding/ModShardingStrategy.cs
+++ b/Arch.Data/Arch.Data/DbEngine/Sharding/ModShardingStrategy.cs
@@ -2,7 +2,6 @@
 using Arch.Data.Common.Enums;
 using Arch.Data.Common.Util;
 using Arch.Data.DbEngine.Configuration;
-using Arch.Data.Exceptions;
 using Arch.Data.Orm.Dialect;
 using Arch.Data.Orm.sql;
 using System;
diff --git a/Arch.Data/Arch.Data/DbEngine/Sharding/ShardingStrategyFactory.cs b/Arch.Data/Arch.Data/DbEngine/Sharding/ShardingStrategyFactory.cs
index 40f34a9a7..5f29ec267 100644
--- a/Arch.Data/Arch.Data/DbEngine/Sharding/ShardingStrategyFactory.cs
+++ b/Arch.Data/Arch.Data/DbEngine/Sharding/ShardingStrategyFactory.cs
@@ -1,5 +1,4 @@
 using Arch.Data.DbEngine.Configuration;
-using Arch.Data.Exceptions;
 using System;
 using System.Collections.Generic;
 
diff --git a/Arch.Data/Arch.Data/Exceptions/DalException.cs b/Arch.Data/Arch.Data/Exceptions/DalException.cs
index 4915a8741..3afae0d99 100644
--- a/Arch.Data/Arch.Data/Exceptions/DalException.cs
+++ b/Arch.Data/Arch.Data/Exceptions/DalException.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Runtime.Serialization;
 
-namespace Arch.Data.Exceptions
+namespace Arch.Data
 {
     [Serializable]
     public class DalException : Exception
diff --git a/Arch.Data/Arch.Data/Exceptions/DalMarkDownException.cs b/Arch.Data/Arch.Data/Exceptions/DalMarkDownException.cs
index 80d31a453..04d004eca 100644
--- a/Arch.Data/Arch.Data/Exceptions/DalMarkDownException.cs
+++ b/Arch.Data/Arch.Data/Exceptions/DalMarkDownException.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Runtime.Serialization;
 
-namespace Arch.Data.Exceptions
+namespace Arch.Data
 {
     [Serializable]
     public class DalMarkDownException : DalException
diff --git a/Arch.Data/Arch.Data/Orm/partially/ExpressionHelper.cs b/Arch.Data/Arch.Data/Orm/partially/ExpressionHelper.cs
index 7a7405b65..eb72f0934 100644
--- a/Arch.Data/Arch.Data/Orm/partially/ExpressionHelper.cs
+++ b/Arch.Data/Arch.Data/Orm/partially/ExpressionHelper.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Linq.Expressions;
 
diff --git a/Arch.Data/Arch.Data/Orm/partially/ReplacePartial.cs b/Arch.Data/Arch.Data/Orm/partially/ReplacePartial.cs
index 919999422..1d5fb2e97 100644
--- a/Arch.Data/Arch.Data/Orm/partially/ReplacePartial.cs
+++ b/Arch.Data/Arch.Data/Orm/partially/ReplacePartial.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 
diff --git a/Arch.Data/Arch.Data/Orm/partially/UpdatePartial.cs b/Arch.Data/Arch.Data/Orm/partially/UpdatePartial.cs
index bce9b1ffa..5bbf34cf4 100644
--- a/Arch.Data/Arch.Data/Orm/partially/UpdatePartial.cs
+++ b/Arch.Data/Arch.Data/Orm/partially/UpdatePartial.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
diff --git a/Arch.Data/Arch.Data/Orm/sql/InConstraint.cs b/Arch.Data/Arch.Data/Orm/sql/InConstraint.cs
index 856142d73..88108b1c4 100644
--- a/Arch.Data/Arch.Data/Orm/sql/InConstraint.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/InConstraint.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Collections;
 using System.Text;
 
diff --git a/Arch.Data/Arch.Data/Orm/sql/NullConstraint.cs b/Arch.Data/Arch.Data/Orm/sql/NullConstraint.cs
index d25d8189b..c0c6cdeb0 100644
--- a/Arch.Data/Arch.Data/Orm/sql/NullConstraint.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/NullConstraint.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 
 namespace Arch.Data.Orm.sql
 {
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlBuilder.cs b/Arch.Data/Arch.Data/Orm/sql/SqlBuilder.cs
index 4d8dbc42a..63a642e94 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlBuilder.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlBuilder.cs
@@ -3,7 +3,6 @@
 using Arch.Data.Common.Util;
 using Arch.Data.DbEngine;
 using Arch.Data.DbEngine.Sharding;
-using Arch.Data.Exceptions;
 using Arch.Data.Orm.Dialect;
 using Arch.Data.Orm.partially;
 using Arch.Data.Utility;
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlColumn.cs b/Arch.Data/Arch.Data/Orm/sql/SqlColumn.cs
index bd895d783..f85802f45 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlColumn.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlColumn.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Data;
 
 namespace Arch.Data.Orm.sql
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlConstraint.cs b/Arch.Data/Arch.Data/Orm/sql/SqlConstraint.cs
index 4010f2617..a8f2d8c79 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlConstraint.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlConstraint.cs
@@ -1,5 +1,4 @@
 using Arch.Data.DbEngine;
-using Arch.Data.Exceptions;
 using System;
 using System.Collections;
 using System.Data;
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlOrder.cs b/Arch.Data/Arch.Data/Orm/sql/SqlOrder.cs
index 6e7f5ffbe..b63a48933 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlOrder.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlOrder.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Text;
 
 namespace Arch.Data.Orm.sql
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlQuery.cs b/Arch.Data/Arch.Data/Orm/sql/SqlQuery.cs
index 3e1cc46e2..1db994b1b 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlQuery.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlQuery.cs
@@ -1,5 +1,4 @@
 using Arch.Data.DbEngine;
-using Arch.Data.Exceptions;
 using Arch.Data.Orm.Dialect;
 using Arch.Data.Orm.FastInvoker;
 using System;
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlTable.cs b/Arch.Data/Arch.Data/Orm/sql/SqlTable.cs
index ae0e8cc33..d95c2283d 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlTable.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlTable.cs
@@ -1,5 +1,4 @@
 using Arch.Data.DbEngine;
-using Arch.Data.Exceptions;
 using System;
 using System.Collections;
 using System.Collections.Generic;
diff --git a/Arch.Data/Arch.Data/Orm/sql/SqlTableFactory.cs b/Arch.Data/Arch.Data/Orm/sql/SqlTableFactory.cs
index 1e4806366..3725f8fed 100644
--- a/Arch.Data/Arch.Data/Orm/sql/SqlTableFactory.cs
+++ b/Arch.Data/Arch.Data/Orm/sql/SqlTableFactory.cs
@@ -1,5 +1,4 @@
-using Arch.Data.Exceptions;
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Reflection;