diff --git a/aspnet-core/migrations/LY.MicroService.RealtimeMessage.DbMigrator/EntityFrameworkCore/RealtimeMessageMigrationsDbContext.cs b/aspnet-core/migrations/LY.MicroService.RealtimeMessage.DbMigrator/EntityFrameworkCore/RealtimeMessageMigrationsDbContext.cs
index 245a8bbb7..3b64d1c37 100644
--- a/aspnet-core/migrations/LY.MicroService.RealtimeMessage.DbMigrator/EntityFrameworkCore/RealtimeMessageMigrationsDbContext.cs
+++ b/aspnet-core/migrations/LY.MicroService.RealtimeMessage.DbMigrator/EntityFrameworkCore/RealtimeMessageMigrationsDbContext.cs
@@ -20,6 +20,7 @@ public class RealtimeMessageMigrationsDbContext : AbpDbContext<RealtimeMessageMi
         base.OnModelCreating(modelBuilder);
 
         modelBuilder.ConfigureNotifications();
+        modelBuilder.ConfigureNotificationsDefinition();
         modelBuilder.ConfigureMessageService();
     }
 }
diff --git a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/AbpNotificationsEntityFrameworkCoreModule.cs b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/AbpNotificationsEntityFrameworkCoreModule.cs
index c9fa4a5f1..4aa8a87e3 100644
--- a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/AbpNotificationsEntityFrameworkCoreModule.cs
+++ b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/AbpNotificationsEntityFrameworkCoreModule.cs
@@ -1,7 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp.AutoMapper;
 using Volo.Abp.Caching;
-using Volo.Abp.EntityFrameworkCore;
 using Volo.Abp.Modularity;
 
 namespace LINGYUN.Abp.Notifications.EntityFrameworkCore;
@@ -20,11 +19,17 @@ public class AbpNotificationsEntityFrameworkCoreModule : AbpModule
             options.AddDefaultRepositories<INotificationsDbContext>();
 
             options.AddRepository<Notification, EfCoreNotificationRepository>();
-            options.AddRepository<NotificationDefinitionRecord, EfCoreNotificationDefinitionRecordRepository>();
-            options.AddRepository<NotificationDefinitionGroupRecord, EfCoreNotificationDefinitionGroupRecordRepository>();
 
             options.AddRepository<UserNotification, EfCoreUserNotificationRepository>();
             options.AddRepository<UserSubscribe, EfCoreUserSubscribeRepository>();
         });
+
+        context.Services.AddAbpDbContext<NotificationsDefinitionDbContext>(options =>
+        {
+            options.AddDefaultRepositories<INotificationsDefinitionDbContext>();
+
+            options.AddRepository<NotificationDefinitionRecord, EfCoreNotificationDefinitionRecordRepository>();
+            options.AddRepository<NotificationDefinitionGroupRecord, EfCoreNotificationDefinitionGroupRecordRepository>();
+        });
     }
 }
diff --git a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionGroupRecordRepository.cs b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionGroupRecordRepository.cs
index fc08242a0..5981de1c9 100644
--- a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionGroupRecordRepository.cs
+++ b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionGroupRecordRepository.cs
@@ -6,12 +6,12 @@ using Volo.Abp.EntityFrameworkCore;
 namespace LINGYUN.Abp.Notifications.EntityFrameworkCore;
 
 public class EfCoreNotificationDefinitionGroupRecordRepository :
-    EfCoreRepository<INotificationsDbContext, NotificationDefinitionGroupRecord, Guid>,
+    EfCoreRepository<INotificationsDefinitionDbContext, NotificationDefinitionGroupRecord, Guid>,
     INotificationDefinitionGroupRecordRepository,
     ITransientDependency
 {
     public EfCoreNotificationDefinitionGroupRecordRepository(
-        IDbContextProvider<INotificationsDbContext> dbContextProvider) 
+        IDbContextProvider<INotificationsDefinitionDbContext> dbContextProvider) 
         : base(dbContextProvider)
     {
     }
diff --git a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionRecordRepository.cs b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionRecordRepository.cs
index 65ed69c5c..8686d64a9 100644
--- a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionRecordRepository.cs
+++ b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/EfCoreNotificationDefinitionRecordRepository.cs
@@ -6,12 +6,12 @@ using Volo.Abp.EntityFrameworkCore;
 namespace LINGYUN.Abp.Notifications.EntityFrameworkCore;
 
 public class EfCoreNotificationDefinitionRecordRepository :
-    EfCoreRepository<INotificationsDbContext, NotificationDefinitionRecord, Guid>,
+    EfCoreRepository<INotificationsDefinitionDbContext, NotificationDefinitionRecord, Guid>,
     INotificationDefinitionRecordRepository,
     ITransientDependency
 {
     public EfCoreNotificationDefinitionRecordRepository(
-        IDbContextProvider<INotificationsDbContext> dbContextProvider)
+        IDbContextProvider<INotificationsDefinitionDbContext> dbContextProvider)
         : base(dbContextProvider)
     {
     }
diff --git a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/INotificationsDefinitionDbContext.cs b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/INotificationsDefinitionDbContext.cs
new file mode 100644
index 000000000..22230257d
--- /dev/null
+++ b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/INotificationsDefinitionDbContext.cs
@@ -0,0 +1,11 @@
+using Volo.Abp.Data;
+using Volo.Abp.EntityFrameworkCore;
+using Volo.Abp.MultiTenancy;
+
+namespace LINGYUN.Abp.Notifications.EntityFrameworkCore;
+
+[IgnoreMultiTenancy]
+[ConnectionStringName(AbpNotificationsDbProperties.ConnectionStringName)]
+public interface INotificationsDefinitionDbContext : IEfCoreDbContext
+{
+}
diff --git a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDbContextModelCreatingExtensions.cs b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDbContextModelCreatingExtensions.cs
index 8e6db1b92..4c5b51d4e 100644
--- a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDbContextModelCreatingExtensions.cs
+++ b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDbContextModelCreatingExtensions.cs
@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Options;
 using System;
 using Volo.Abp;
 using Volo.Abp.EntityFrameworkCore.Modeling;
@@ -59,11 +60,26 @@ namespace LINGYUN.Abp.Notifications.EntityFrameworkCore
                  .HasDatabaseName("IX_Tenant_User_Notification_Name")
                  .IsUnique();
             });
+        }
+
+        public static void ConfigureNotificationsDefinition(
+           this ModelBuilder builder,
+           Action<AbpNotificationsModelBuilderConfigurationOptions> optionsAction = null)
+        {
+            Check.NotNull(builder, nameof(builder));
+
+            if (!builder.IsHostOnlyDatabase())
+            {
+                return;
+            }
+
+            var options = new AbpNotificationsModelBuilderConfigurationOptions();
+
+            optionsAction?.Invoke(options);
 
             builder.Entity<NotificationDefinitionGroupRecord>(b =>
             {
                 b.ToTable(options.TablePrefix + "NotificationDefinitionGroups", options.Schema);
-
                 b.Property(p => p.Name)
                  .HasMaxLength(NotificationDefinitionGroupRecordConsts.MaxNameLength)
                  .IsRequired();
@@ -79,7 +95,6 @@ namespace LINGYUN.Abp.Notifications.EntityFrameworkCore
             builder.Entity<NotificationDefinitionRecord>(b =>
             {
                 b.ToTable(options.TablePrefix + "NotificationDefinitions", options.Schema);
-
                 b.Property(p => p.Name)
                  .HasMaxLength(NotificationDefinitionRecordConsts.MaxNameLength)
                  .IsRequired();
diff --git a/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDefinitionDbContext.cs b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDefinitionDbContext.cs
new file mode 100644
index 000000000..683382198
--- /dev/null
+++ b/aspnet-core/modules/notifications/LINGYUN.Abp.Notifications.EntityFrameworkCore/LINGYUN/Abp/Notifications/EntityFrameworkCore/NotificationsDefinitionDbContext.cs
@@ -0,0 +1,23 @@
+using Microsoft.EntityFrameworkCore;
+using Volo.Abp.Data;
+using Volo.Abp.EntityFrameworkCore;
+using Volo.Abp.MultiTenancy;
+
+namespace LINGYUN.Abp.Notifications.EntityFrameworkCore;
+
+[ConnectionStringName(AbpNotificationsDbProperties.ConnectionStringName)]
+public class NotificationsDefinitionDbContext : AbpDbContext<NotificationsDefinitionDbContext>, INotificationsDefinitionDbContext
+{
+    public NotificationsDefinitionDbContext(DbContextOptions<NotificationsDefinitionDbContext> options)
+        : base(options)
+    {
+    }
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.SetMultiTenancySide(MultiTenancySides.Host);
+
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.ConfigureNotificationsDefinition();
+    }
+}
diff --git a/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/EfCoreTenantRepository.cs b/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/EfCoreTenantRepository.cs
index db423ab7d..345999820 100644
--- a/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/EfCoreTenantRepository.cs
+++ b/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/EfCoreTenantRepository.cs
@@ -175,24 +175,36 @@ public class EfCoreTenantRepository : EfCoreRepository<ISaasDbContext, Tenant, G
             var tenantDbSet = dbContext.Set<Tenant>()
                 .IncludeDetails(includeDetails);
 
-            var queryable = tenantDbSet
+            tenantDbSet = tenantDbSet
                .WhereIf(!filter.IsNullOrWhiteSpace(), u => u.Name.Contains(filter))
                .OrderBy(sorting.IsNullOrEmpty() ? nameof(Tenant.Name) : sorting);
 
-            var combinedResult = await queryable
-                .Join(
-                    editionDbSet,
-                    o => o.EditionId,
-                    i => i.Id,
-                    (tenant, edition) => new { tenant, edition })
-                .Skip(skipCount)
-                .Take(maxResultCount)
-                .ToListAsync(GetCancellationToken(cancellationToken));
+            var combinedResult = await (from tenant in tenantDbSet
+                             join edition in editionDbSet on tenant.EditionId equals edition.Id
+                             into eg from e in eg.DefaultIfEmpty()
+                             select new
+                             {
+                                 Tenant = tenant,
+                                 Edition = e,
+                             })
+                             .Skip(skipCount)
+                             .Take(maxResultCount)
+                             .ToListAsync(GetCancellationToken(cancellationToken));
+
+            //var combinedResult = await tenantDbSet
+            //    .Join(
+            //        editionDbSet,
+            //        o => o.EditionId,
+            //        i => i.Id,
+            //        (tenant, edition) => new { tenant, edition })
+            //    .Skip(skipCount)
+            //    .Take(maxResultCount)
+            //    .ToListAsync(GetCancellationToken(cancellationToken));
 
             return combinedResult.Select(s =>
             {
-                s.tenant.Edition = s.edition;
-                return s.tenant;
+                s.Tenant.Edition = s.Edition;
+                return s.Tenant;
             }).ToList();
         }
 
diff --git a/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/SaasDbContext.cs b/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/SaasDbContext.cs
index b3e9b95f4..abcf2e657 100644
--- a/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/SaasDbContext.cs
+++ b/aspnet-core/modules/saas/LINGYUN.Abp.Saas.EntityFrameworkCore/LINGYUN/Abp/Saas/EntityFrameworkCore/SaasDbContext.cs
@@ -24,6 +24,8 @@ public class SaasDbContext : AbpDbContext<SaasDbContext>, ISaasDbContext
 
     protected override void OnModelCreating(ModelBuilder builder)
     {
+        builder.SetMultiTenancySide(MultiTenancySides.Host);
+
         base.OnModelCreating(builder);
 
         builder.ConfigureSaas();