MySQL中update替换部分字符串replace的简单用法
近日，遇到了需要将部分字符串替换为另外的字符，平时用的最多的是直接update整个字段值，在这种情况下效率比较低，而且容易出错。其实mysql提供了正则表达式中replace这个函数，用起来很简单，特此记录如下：
1、创建测试数据
DROP TABLE IF EXISTS `activity`; CREATE TABLE `activity` ( `id` bigint(20) NOT NULL, `code` varchar(100) NOT NULL COMMENT '活动编号', `name` varchar(64) NOT NULL COMMENT '活动名称', `desc` varchar(64) DEFAULT NULL COMMENT '活动描述', `type` tinyint(4) NOT NULL COMMENT '活动类型：事件活动，分享活动', `count` int(11) NOT NULL COMMENT '可完成次数', `auto_receive` int(11) DEFAULT '0' COMMENT '是否自动领取奖励', `show_in_center` int(11) DEFAULT '1' COMMENT '是否在任务中心展示', `reward_gold` int(11) NOT NULL COMMENT '奖励金币个数', `reward_silver` int(11) NOT NULL COMMENT '奖励银币个数', `time_unit` varchar(45) NOT NULL COMMENT '活动间隔时间单位', `time` int(11) NOT NULL COMMENT '参加活动时间间隔', `priority` int(11) NOT NULL COMMENT '活动优先级', `event` varchar(100) DEFAULT NULL COMMENT '活动所需事件', `show_after_activity` bigint(20) DEFAULT NULL COMMENT '在某个活动完成后出现', `status` tinyint(4) NOT NULL COMMENT '活动是否有效', `start_time` datetime(3) NOT NULL COMMENT '活动开始时间', `end_time` datetime(3) NOT NULL COMMENT '活动结束时间', `create_time` bigint(20) NOT NULL COMMENT '创建时间', `update_time` bigint(20) NOT NULL COMMENT '更新时间', `action` varchar(100) DEFAULT NULL COMMENT '活动所需的行动', `action_details` varchar(1000) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='活动表' ; insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(1,'addFriend','每日：添加好友','添加3位好友',1,3,0,1,100,0,'1',0,999990,'addFriendEvent',null,0,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','ADDRESS_BOOK','{"button_desc":"立即添加"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(2,'friendTalk','和朋友聊天超过 25 句','与朋友聊天，可获得大量金币，聊的越多，赚的越多。与单个朋友聊天超过 25 句话，可获得额外金币！',1,25,1,1,25,0,'1',0,130,'talkNtoN',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','TALK','{"button_desc":"去聊天"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(3,'addGroup','每日：加入群聊','加入群聊',1,1,0,1,15,0,'1',0,999990,'addGroupEvent',null,0,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','ADD_FRIEND_OR_TEAM','{"button_desc":"立即加入"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(4,'groupTalk','群聊中发言超过 25 句','参与群聊，可获得大量金币，聊的越多，赚的越多。在单个群聊中发言超过 25 次，可获得额外金币！',1,25,1,1,25,0,'1',0,140,'newGroupTalkEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','TALK','{"button_desc":"去聊天"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(5,'setUpID','设置聊天宝号','朋友可通过搜索“聊天宝号”找到你，快快抢注一个好记的聊天宝号吧！',1,1,1,1,50,0,'0',0,60,'setIDEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','ACCOUNT_AND_SAFE','{"button_desc":"立即设置"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(6,'bindAlipay','绑定支付宝账号','绑定后可将现金收入提现到支付宝，也可通过支付宝扫码付款、发送聊天红包',1,1,1,1,100,0,'0',0,40,'bindAlipayEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','ACCOUNT_AND_SAFE','{"button_desc":"去绑定"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(7,'inviteSuccess','新手：首次邀请好友注册','新手：首次邀请好友注册',1,1,0,1,300,0,'0',0,999990,'inviteEvent',null,0,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','REDIRECT','{"button_desc":"去邀请","url":"https://point.zidanduanxin.com/invite"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(8,'shareIncome','晒收益','晒收益',2,1,0,0,100,0,'1',0,100000,'',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','SHARE','{"income":"%d","button_desc":""}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(9,'scanAlipay','扫码支付','在右上角的菜单里使用扫码支付，线下付款成功后可获得金币奖励哦',2,1,0,1,50,0,'1',0,91,'',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','SCAN_ALIPAY','{"button_desc":""}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(10,'treasureBox','完成任务','宝箱任务',1,2,0,0,18,0,'1',0,100000,'activityCompleteEvent',-1,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','','{"button_desc":"","condition_desc":"还需要完成%s个任务打开宝箱"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(11,'treasureBox','完成任务','宝箱任务',1,4,0,0,68,0,'1',0,100000,'activityCompleteEvent',-1,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','','{"button_desc":"","condition_desc":"还需要完成%s个任务打开宝箱"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(12,'treasureBox','完成任务','宝箱任务',1,6,0,0,88,0,'1',0,100000,'activityCompleteEvent',-1,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','','{"button_desc":"","condition_desc":"还需要完成%s个任务打开宝箱"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(13,'treasureBox','完成任务','宝箱任务',1,8,0,0,48,0,'1',0,100000,'activityCompleteEvent',-1,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','','{"button_desc":"","condition_desc":"还需要完成%s个任务打开宝箱"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(14,'firstTextMoments','发 1 条文字熟人圈帖子','发送一条纯文字形式的熟人圈帖子可获得金币奖励',3,1,1,1,20,0,'1',0,150,'postTextMomentsEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS_TEXT','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(15,'firstImageMoments','发 1 条图文熟人圈帖子','发送一条包含图片的熟人圈帖子可获得金币奖励',3,1,1,1,20,0,'1',0,160,'postImageMomentsEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS_TEXT','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(16,'firstVideoMoments','发 1 条视频熟人圈帖子','发送一条包含视频的熟人圈帖子可获得金币奖励',3,1,1,1,20,0,'1',0,170,'postVideoMomentsEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS_TEXT','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(17,'likeFriendsMoments','给 3 个熟人圈帖子点赞','给 3 个好友的熟人圈帖子各点赞 1 次即可获得金币奖励，点赞自己发的帖子不算哦',3,3,1,1,10,0,'1',0,999990,'likeFriendsMomentsEvent',null,0,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(18,'commentFriendsMoments','给 3 个朋友评论','给 3 个朋友的熟人圈帖子各评论 1 次即可获得金币奖励，评论自己发的帖子不算哦',3,3,1,1,15,0,'1',0,180,'commentFriendsMomentsEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(19,'momentsBeLiked','被 5 个朋友点赞','自己发的熟人圈帖子，被 5 个以上的好友点赞，即可获得金币奖励',1,5,0,1,30,0,'1',0,999990,'momentsBeLikedEvent',null,0,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(20,'momentsBeCommented','被 5 个朋友评论','自己发的熟人圈帖子，被 5 个以上的朋友评论，即可获得金币奖励，回复朋友评论还可能获得额外奖励',1,5,1,1,30,0,'1',0,120,'momentsBeCommentedEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','MOMENTS','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(21,'inviteSmsFriend','邀请 1 个通讯录朋友','首次通过通讯录邀请朋友注册聊天宝，不仅能够获得邀请红包，更能获得 150 金币哦',1,1,1,1,150,0,'0',0,0,'smsInviteEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','REDIRECT','{"button_desc":"去邀请","url":"https://point.zidanduanxin.com/invite"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(22,'inviteQQFriend','邀请 1 个 QQ 朋友','首次通过 QQ 邀请朋友注册聊天宝，不仅能够获得邀请红包，更能获得 100 金币哦',1,1,1,1,100,0,'0',0,10,'qqInviteEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','REDIRECT','{"button_desc":"去邀请","url":"https://point.zidanduanxin.com/invite"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(23,'inviteWechatFriend','邀请 1 个微信朋友','首次通过微信邀请朋友注册聊天宝，不仅能够获得随机邀请红包，更能获得 100 金币哦',1,1,1,1,100,0,'0',0,20,'wechatInviteEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','REDIRECT','{"button_desc":"去邀请","url":"https://point.zidanduanxin.com/invite"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(24,'setReadName','昵称修改为真实姓名','将昵称设置为真实姓名更容易朋友认出来哦，快去完成任务领取金币吧',1,1,1,1,100,0,'0',0,30,'setNameEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','PERSONAL_INFO','{"button_desc":"去修改"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(25,'setRealAvatar','设置真人头像','设置真人头像更容易被朋友认出来哦，快去完成任务领取金币吧',1,1,1,1,50,0,'0',0,50,'setAvatarEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','PERSONAL_INFO','{"button_desc":"去设置"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(26,'setProfileInfo','完善个人信息','完善你的性别、地区、签名，能让你的朋友更加了解你哦！全部填完才能领取奖励',1,1,1,1,50,0,'0',0,70,'setInfoEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','PERSONAL_INFO','{"button_desc":"立即设置"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(27,'firstRead','首次阅读 1 篇新闻','在新闻页面选择 1 篇感兴趣的新闻并获得 1 次阅读奖励，即可额外获得 50 金币奖励',1,1,1,1,50,0,'0',0,80,'firstReadEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','NEWS','{"button_desc":"去阅读"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(28,'firstMoments','发送 1 条熟人圈帖子','发送 1 条熟人圈帖子即可获得额外金币，文字、图片、小视频都可以',1,1,1,1,50,0,'0',0,90,'firstMomentsEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1542454142000','1542454142000','MOMENTS_TEXT','{"button_desc":"去完成"}'); insert into `activity`(`id`,`code`,`name`,`desc`,`type`,`count`,`auto_receive`,`show_in_center`,`reward_gold`,`reward_silver`,`time_unit`,`time`,`priority`,`event`,`show_after_activity`,`status`,`start_time`,`end_time`,`create_time`,`update_time`,`action`,`action_details`) values(29,'dailyRead','阅读新闻 20 分钟','每天阅读新闻 20 分钟，除了阅读过程中的奖励，还可获得额外金币奖励！',1,1200,1,1,30,0,'1',0,100,'readEvent',null,1,'2018-11-17 11:29:21','2022-11-17 11:29:22','1543327524000','1543327524000','NEWS','{"button_desc":"去完成"}');
2、查询name、desc中含有好友的记录
mysql> select id,name,`desc`,update_time from activity where name regexp '好友' or desc regexp '好友'; +------+-----------------------------------+--------------------------------------------------------------------------------------------------------------+---------------+ | id | name | desc | update_time | +------+-----------------------------------+--------------------------------------------------------------------------------------------------------------+---------------+ | 1 | 每日：添加好友 | 添加3位好友 | 1542454142000 | | 7 | 新手：首次邀请好友注册 | 新手：首次邀请好友注册 | 1543327524000 | | 17 | 给 3 个熟人圈帖子点赞 | 给 3 个好友的熟人圈帖子各点赞 1 次即可获得金币奖励，点赞自己发的帖子不算哦 | 1543327524000 | | 19 | 被 5 个朋友点赞 | 自己发的熟人圈帖子，被 5 个以上的好友点赞，即可获得金币奖励 | 1543327524000 | +------+-----------------------------------+--------------------------------------------------------------------------------------------------------------+---------------+ 4 rows in set (0.01 sec)
3、用update 含有 replace函数进行修改
-- 将name和desc中的好友字符串替换成朋友 mysql> update activity set name=replace(name,'好友','朋友'), `desc`=replace(`desc`,'好友','朋友') where name regexp '好友' or desc regexp '好友'; Query OK, 4 rows affected (0.03 sec)
4、再次查询结果验证
mysql> select id,name,`desc`,update_time from activity where name regexp '好友' or desc regexp '好友'; Empty set (0.01 sec) mysql> select id,name,`desc`,update_time from activity where id in (1,7,17,19); +------+-----------------------------------+--------------------------------------------------------------------------------------------------------------+---------------+ | id | name | desc | update_time | +------+-----------------------------------+--------------------------------------------------------------------------------------------------------------+---------------+ | 1 | 每日：添加朋友 | 添加3位朋友 | 1542454142000 | | 7 | 新手：首次邀请朋友注册 | 新手：首次邀请朋友注册 | 1543327524000 | | 17 | 给 3 个熟人圈帖子点赞 | 给 3 个朋友的熟人圈帖子各点赞 1 次即可获得金币奖励，点赞自己发的帖子不算哦 | 1543327524000 | | 19 | 被 5 个朋友点赞 | 自己发的熟人圈帖子，被 5 个以上的朋友点赞，即可获得金币奖励 | 1543327524000 | +------+-----------------------------------+--------------------------------------------------------------------------------------------------------------+---------------+ 4 rows in set (0.01 sec)