diff --git a/SqlServerTest/Demo/DbFirst.cs b/SqlServerTest/Demo/DbFirst.cs
index 7b5e28e7d..063eba5c6 100644
--- a/SqlServerTest/Demo/DbFirst.cs
+++ b/SqlServerTest/Demo/DbFirst.cs
@@ -11,19 +11,19 @@ namespace OrmTest.Demo
         public static void Init()
         {
             var db = GetInstance();
-            //Create all class
-            db.DbFirst.CreateClassFile("c:\\Demo\\1");
+            ////Create all class
+            //db.DbFirst.CreateClassFile("c:\\Demo\\1");
 
-            //Create student calsss
-            db.DbFirst.Where("Student").CreateClassFile("c:\\Demo\\2");
-            //Where(array)
+            ////Create student calsss
+            //db.DbFirst.Where("Student").CreateClassFile("c:\\Demo\\2");
+            ////Where(array)
 
-            //Mapping name
-            db.MappingTables.Add("ClassStudent", "Student");
-            db.DbFirst.Where("Student").CreateClassFile("c:\\Demo\\3");
+            ////Mapping name
+            //db.MappingTables.Add("ClassStudent", "Student");
+            //db.DbFirst.Where("Student").CreateClassFile("c:\\Demo\\3");
 
-            //Remove mapping
-            db.MappingTables.Clear();
+            ////Remove mapping
+            //db.MappingTables.Clear();
 
             //Create class with default value
             db.DbFirst.IsCreateDefaultValue().CreateClassFile("c:\\Demo\\4");
diff --git a/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs b/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
index e5a84ad93..524ca0039 100644
--- a/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
+++ b/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
@@ -250,7 +250,6 @@ namespace SqlSugar
             {
                 result += "?";
             }
-
             return result;
         }
         private string GetPropertyTypeConvert(DbColumnInfo item)
diff --git a/SqlSugar/Abstract/DbMaintenanceProvider/DbMaintenanceProvider.cs b/SqlSugar/Abstract/DbMaintenanceProvider/DbMaintenanceProvider.cs
index c0e5b4719..ea136d174 100644
--- a/SqlSugar/Abstract/DbMaintenanceProvider/DbMaintenanceProvider.cs
+++ b/SqlSugar/Abstract/DbMaintenanceProvider/DbMaintenanceProvider.cs
@@ -40,7 +40,7 @@ namespace SqlSugar
         {
             if (string.IsNullOrEmpty(tableName)) return new List<DbColumnInfo>();
             string key = "DbMaintenanceProvider.GetColumnInfosByTableName." + tableName.ToLower();
-            return GetListOrCache<DbColumnInfo>(key, this.GetColumnInfosByTableNameSql);
+            return GetListOrCache<DbColumnInfo>(key,string.Format(this.GetColumnInfosByTableNameSql,tableName));
         }
 
         public virtual List<string> GetIsIdentities(string tableName)
diff --git a/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs b/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs
index 00d9c967c..11079e67d 100644
--- a/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs
+++ b/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs
@@ -72,7 +72,7 @@ namespace SqlSugar
                          WHERE xtype IN('u',
                                         'v') )
                       AND (systypes.name <> 'sysname')
-                      AND sysobjects.name='student'
+                      AND sysobjects.name='{0}'
                       AND systypes.name<>'geometry'
                       AND systypes.name<>'geography'
                     ORDER BY syscolumns.colid";