Sql server2008中merge用法

  　　　　 /// <summary>
         /// 修改:添加条件: AND roleModule.FuncCode = tvpRoleModule.FuncCode
         /// </summary>
         private static readonly string SQL_PernissionReRoleModuleCreate = @"MERGE [dbo].[PernissionReRoleModule] AS roleModule
 USING @tvp AS tvpRoleModule
 ON (roleModule.RoleId = tvpRoleModule.RoleId AND roleModule.ModuleId = tvpRoleModule.ModuleId AND roleModule.FuncCode = tvpRoleModule.FuncCode)
 WHEN MATCHED
  THEN UPDATE SET roleModule.FuncCode = tvpRoleModule.FuncCode,roleModule.OptScope = tvpRoleModule.OptScope
 WHEN NOT MATCHED THEN
   INSERT(RoleId,ModuleId,FuncCode,OptScope)
         VALUES(tvpRoleModule.RoleId,tvpRoleModule.ModuleId,tvpRoleModule.FuncCode,tvpRoleModule.OptScope)
 WHEN NOT MATCHED BY SOURCE AND roleModule.RoleId  = @roleId
      THEN DELETE;";

         /// <summary>
         /// 创建新的角色功能信息
         /// </summary>
         /// <param name="organization">角色功能实体类</param>
         /// <returns></returns>
         public int Create(IList<PernissionReRoleModule> module, int roleId)
         {

             DataTable tblData = new DataTable();
             tblData.Columns.Add("RoleId", typeof(Int32));
             tblData.Columns.Add("ModuleId", typeof(Int32));
             tblData.Columns.Add("FunCode", typeof(int));
             tblData.Columns.Add("OptScope", typeof(int));
             foreach (var item in module)
             {
                 tblData.Rows.Add(new object[] { roleId, item.ModuleId, item.FuncCode, item.OptScope });
             }

             var cmd = this.sqlHelper.PrepareTextSqlCommand(SQL_PernissionReRoleModuleCreate);
             cmd.AddParam("@roleId", roleId);
             var param = cmd.Parameters.AddWithValue("@tvp", tblData);

             param.SqlDbType = SqlDbType.Structured;
             param.TypeName = "dbo.ReRoleModule";
             return cmd.ExecuteWrapNonQuery();
         }
         #endregion