diff --git a/samples/Sample.AutoCreateIfPresent/DefaultDbContext.cs b/samples/Sample.AutoCreateIfPresent/DefaultDbContext.cs
index 396cad2a..d1182b02 100644
--- a/samples/Sample.AutoCreateIfPresent/DefaultDbContext.cs
+++ b/samples/Sample.AutoCreateIfPresent/DefaultDbContext.cs
@@ -14,6 +14,7 @@ namespace Sample.AutoCreateIfPresent
 {
     public class DefaultDbContext:AbstractShardingDbContext,IShardingTableDbContext
     {
+
         public DefaultDbContext(DbContextOptions<DefaultDbContext> options) : base(options)
         {
         }
diff --git a/samples/Sample.AutoCreateIfPresent/Program.cs b/samples/Sample.AutoCreateIfPresent/Program.cs
index e57e184f..aef2b64e 100644
--- a/samples/Sample.AutoCreateIfPresent/Program.cs
+++ b/samples/Sample.AutoCreateIfPresent/Program.cs
@@ -2,6 +2,8 @@ using Microsoft.EntityFrameworkCore;
 using Sample.AutoCreateIfPresent;
 using ShardingCore;
 using ShardingCore.Bootstrappers;
+using ShardingCore.Core.DbContextCreator;
+using ShardingCore.Core.RuntimeContexts;
 using ShardingCore.TableExists;
 using ShardingCore.TableExists.Abstractions;
 
@@ -38,7 +40,8 @@ builder.Services.AddShardingDbContext<DefaultDbContext>()
         {
             b.UseMySql(conn, new MySqlServerVersion(new Version())).UseLoggerFactory(efLogger);
         });
-    }).ReplaceService<ITableEnsureManager,MySqlTableEnsureManager>().AddShardingCore();
+    })
+    .ReplaceService<ITableEnsureManager,MySqlTableEnsureManager>().AddShardingCore();
 var app = builder.Build();
 
 // Configure the HTTP request pipeline.
diff --git a/samples/Sample.MySql/Domain/Maps/SysUserLogByMonthMap.cs b/samples/Sample.MySql/Domain/Maps/SysUserLogByMonthMap.cs
index cedca253..2609c82e 100644
--- a/samples/Sample.MySql/Domain/Maps/SysUserLogByMonthMap.cs
+++ b/samples/Sample.MySql/Domain/Maps/SysUserLogByMonthMap.cs
@@ -14,7 +14,7 @@ namespace Sample.MySql.Domain.Maps
         {
             builder.HasKey(o => o.Id);
             builder.Property(o => o.Id).IsRequired().HasMaxLength(128);
-            builder.ToTable(nameof(SysUserLogByMonth));
+            builder.ToTable("Sys_User_LogBy_Month");
         }
     }
 }
\ No newline at end of file
diff --git a/samples/Sample.MySql/Migrations/20220704042701_init.cs b/samples/Sample.MySql/Migrations/20220704042701_init.cs
index 49ad62bb..ec0b641a 100644
--- a/samples/Sample.MySql/Migrations/20220704042701_init.cs
+++ b/samples/Sample.MySql/Migrations/20220704042701_init.cs
@@ -28,7 +28,7 @@ namespace Sample.MySql.Migrations
                 .Annotation("MySql:CharSet", "utf8mb4");
 
             migrationBuilder.CreateTable(
-                name: "SysUserLogByMonth",
+                name: "Sys_User_LogBy_Month",
                 columns: table => new
                 {
                     Id = table.Column<string>(type: "varchar(128)", maxLength: 128, nullable: false)
@@ -37,7 +37,7 @@ namespace Sample.MySql.Migrations
                 },
                 constraints: table =>
                 {
-                    table.PrimaryKey("PK_SysUserLogByMonth", x => x.Id);
+                    table.PrimaryKey("PK_Sys_User_LogBy_Month", x => x.Id);
                 })
                 .Annotation("MySql:CharSet", "utf8mb4");
 
@@ -64,7 +64,7 @@ namespace Sample.MySql.Migrations
                 name: "SysTest");
 
             migrationBuilder.DropTable(
-                name: "SysUserLogByMonth");
+                name: "Sys_User_LogBy_Month");
 
             migrationBuilder.DropTable(
                 name: "SysUserMod");
diff --git a/src/ShardingCore/Helpers/MigrationHelper.cs b/src/ShardingCore/Helpers/MigrationHelper.cs
index e604e162..c7fc3fa0 100644
--- a/src/ShardingCore/Helpers/MigrationHelper.cs
+++ b/src/ShardingCore/Helpers/MigrationHelper.cs
@@ -158,12 +158,15 @@ namespace ShardingCore.Helpers
                     shardings.ForEach(aShardingTable =>
                     {
                         string newCmd = sourceCmd;
-                        GetReplaceGroups(operation, absTableName, aShardingTable).ForEach(aReplace =>
+                        var replaceGroups = GetReplaceGroups(operation, absTableName, aShardingTable);
+                        foreach (var migrationReplaceItem in replaceGroups)
                         {
+                            var delimitSourceNameIdentifier = sqlGenerationHelper.DelimitIdentifier(migrationReplaceItem.SourceName);
+                            var delimitTargetNameIdentifier = sqlGenerationHelper.DelimitIdentifier(migrationReplaceItem.TargetName);
                             newCmd = newCmd.Replace(
-                                sqlGenerationHelper.DelimitIdentifier(aReplace.sourceName),
-                                sqlGenerationHelper.DelimitIdentifier(aReplace.targetName));
-                        });
+                                delimitSourceNameIdentifier,
+                                delimitTargetNameIdentifier);
+                        }
                         if (newCmd.Contains(
                                 "EXEC sp_addextendedproperty 'MS_Description', @description, 'SCHEMA', @defaultSchema, 'TABLE'"))
                         {
@@ -185,13 +188,13 @@ namespace ShardingCore.Helpers
             }
         }
 
-        private static List<(string sourceName, string targetName)> GetReplaceGroups(
+        private static ISet<MigrationReplaceItem> GetReplaceGroups(
             MigrationOperation operation, string sourceTableName, string targetTableName)
         {
-            List<(string sourceName, string targetName)> resList =
-                new List<(string sourceName, string targetName)>
+            ISet<MigrationReplaceItem> resList =
+                new HashSet<MigrationReplaceItem>()
                 {
-                    (sourceTableName, targetTableName)
+                    new MigrationReplaceItem(sourceTableName, targetTableName)
                 };
 
             string name = operation.GetPropertyValue("Name") as string;
@@ -209,7 +212,7 @@ namespace ShardingCore.Helpers
                         if (Regex.IsMatch(name, aPattern))
                         {
                             var newName = new Regex(aPattern).Replace(name, "${1}" + targetTableName + "$3");
-                            resList.Add((name, newName));
+                            resList.Add(new MigrationReplaceItem(name, newName));
                             break;
                         }
                     }
@@ -235,14 +238,22 @@ namespace ShardingCore.Helpers
                     var propertyValue = aProperty.GetValue(operation);
                     if (propertyValue is MigrationOperation propertyOperation)
                     {
-                        resList.AddRange(GetReplaceGroups(propertyOperation, sourceTableName, targetTableName));
+                        var migrationReplaceItems = GetReplaceGroups(propertyOperation, sourceTableName, targetTableName);
+                        foreach (var migrationReplaceItem in migrationReplaceItems)
+                        {
+                            resList.Add(migrationReplaceItem);
+                        }
                     }
                     else if (listPropertyWhere(aProperty))
                     {
                         foreach (var aValue in (IEnumerable)propertyValue)
                         {
-                            resList.AddRange(GetReplaceGroups((MigrationOperation)aValue, sourceTableName,
-                                targetTableName));
+                            var migrationReplaceItems = GetReplaceGroups((MigrationOperation)aValue, sourceTableName,
+                                targetTableName);
+                            foreach (var migrationReplaceItem in migrationReplaceItems)
+                            {
+                                resList.Add(migrationReplaceItem);
+                            }
                         }
                     }
                 });
diff --git a/src/ShardingCore/Helpers/MigrationReplaceItem.cs b/src/ShardingCore/Helpers/MigrationReplaceItem.cs
new file mode 100644
index 00000000..746063d7
--- /dev/null
+++ b/src/ShardingCore/Helpers/MigrationReplaceItem.cs
@@ -0,0 +1,46 @@
+using System;
+
+namespace ShardingCore.Helpers
+{
+    
+    public class MigrationReplaceItem
+    {
+        public string SourceName { get; }
+        public string TargetName { get; }
+
+        public MigrationReplaceItem(string sourceName,string targetName)
+        {
+            SourceName = sourceName;
+            TargetName = targetName;
+        }
+        protected bool Equals(MigrationReplaceItem other)
+        {
+            return SourceName == other.SourceName && TargetName == other.TargetName;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != this.GetType()) return false;
+            return Equals((MigrationReplaceItem)obj);
+        }
+#if !EFCORE2
+
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(SourceName, TargetName);
+        }
+#endif
+#if EFCORE2
+
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                return ((SourceName != null ? SourceName.GetHashCode() : 0) * 397) ^ (TargetName != null ? TargetName.GetHashCode() : 0);
+            }
+        }
+#endif
+    }
+}