diff --git a/database/maildb.sql b/database/maildb.sql
index 16d7255c..497446cc 100644
--- a/database/maildb.sql
+++ b/database/maildb.sql
@@ -55,7 +55,6 @@ CREATE TABLE `t_mail` (
   `expiretime` int(11) NOT NULL DEFAULT '0' COMMENT '过期时间',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
-  UNIQUE KEY `idx` (`idx`),
   UNIQUE KEY `unikey` (`unikey`),
   UNIQUE KEY `mail_id` (`mail_id`),
   PRIMARY KEY (`idx`)
@@ -79,8 +78,8 @@ CREATE TABLE `t_group` (
   `deleted` int(11) NOT NULL DEFAULT '0' COMMENT '是否已删除',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
-  UNIQUE KEY `idx` (`idx`),
-  PRIMARY KEY (`group_id`)
+  UNIQUE KEY `idx_group_id` (`group_id`),
+  PRIMARY KEY (`idx`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
@@ -99,8 +98,8 @@ CREATE TABLE `t_member` (
   `deleted` int(11) NOT NULL DEFAULT '0' COMMENT '是否已删除',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
-  UNIQUE KEY `idx` (`idx`),
-  PRIMARY KEY (`group_id`, `member_id`)
+  UNIQUE KEY `idx_group_id_member_id` (`group_id`, `member_id`),
+  PRIMARY KEY (`idx`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
@@ -120,10 +119,10 @@ CREATE TABLE `t_inbox` (
   `expiretime` int(11) NOT NULL DEFAULT '0' COMMENT '过期时间',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
-  UNIQUE KEY `idx` (`idx`),
-  PRIMARY KEY (`account_id`, `mail_id`),
+  UNIQUE KEY `idx_account_id_mail_id` (`account_id`, `mail_id`),
   KEY `idx_state` (`state`),
-  KEY `idx_expiretime` (`expiretime`)
+  KEY `idx_expiretime` (`expiretime`),
+  PRIMARY KEY (`idx`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
@@ -159,8 +158,8 @@ CREATE TABLE `t_param` (
   `param_val1` varchar(255) CHARACTER SET utf8 NOT NULL DEFAULT '' COMMENT '参数1',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
-  UNIQUE KEY `idx` (`idx`),
-  PRIMARY KEY (`param_name`)
+  UNIQUE KEY `idx_param_name` (`param_name`),
+  PRIMARY KEY (`idx`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
@@ -187,8 +186,8 @@ CREATE TABLE `t_sys_mail` (
   `user_reg_end_time` int(11) NOT NULL DEFAULT '0' COMMENT '用户注册结束时间',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
-  PRIMARY KEY (`idx`),
-  UNIQUE KEY `unikey` (`unikey`)
+  UNIQUE KEY `unikey` (`unikey`),
+  PRIMARY KEY (`idx`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;