考虑到新项目中部分与业务数据相关的表在后期数据量会比较大,架构师在最开始设计项目中与业务数据相关的表时,就已经考虑使用分表来 进行处理,给业务数据相关的每张表都添加统一批次的后缀,查询这些数据时,根据不同表名的后缀和来查询对应的数据信息。如果能够动态的 更改数据表,比如将ai_user表更改为ai_user_202200...
前言 工作多年,分库分表的场景也见到不少了,但是我仍然对其原理一知半解。趁着放假前时间比较富裕,我想要解答三个问题: 为什么mybatis的mapper.xml文件里的sql不需要拼接表名中的分表? mybatis是如何识别分表位的? 最近工作中遇到的问题:为什么我的三表join会报错找不到表?为了不影响项目上线时间,我不得不在map...
篇1 My Hometown Ningxia My hometown, Ningxia, is a beautiful province located in northwestern China. It is known for its stunning natural landscapes, rich history, and unique culture.Ningxia is surrounded by mountains on three sides, making it a picturesque destination for outdoor enthusiasts. The...
C. It had an exhibition to show the new gloves. D. It asked people to sell old phones to Sean Miles. 【4】Which of the following is true according to the passage? A. The new gloves will not be on market at a big amount before this July. B. Sean Miles hopes that people will th...
阅读理解It was Thanksgiving morning and in the crowded kitchen of my small home I was busy preparing the traditional Thanksgiving turkey when the doorbell rang.I opened the front door and saw two small children in rags huddling g together inside
It was a hot day. At noon I stepped at the traffic lights and saw a homeless man walking up and down in the street. “This will make me smile, I thought, and I turned my car towards a frozen yogurt shop. I grabbed a and filled it with a couple of flav
as well as take all my money. I have become obsessed with the instrument that has been one of the center pieces of music history. From bluesmusicin the early 1900s to pop music of today and everywhere in between theguitarhas influenced music almost as much as those singing it. I have ...
It's Christmas in my heart 就是我心里的圣诞节 Everywhere I go and everyone I know 我去的每个地方地方,我认识的每一个人 Is making lots of wishes for old Santa Claus 都在向圣诞老人许愿 But all I really need tonight 但是今晚我真正需要的 ...
"You knew the whole time,"I said.Laughing,you said,"Might as well get used to it:teachers see everything." 有一天,我们在给老鼠打扫笼子的时候,你把我叫到你桌前,告诉我说我们可能不得不把这对兄弟的名字改为老鼠妈妈和老鼠爸爸。 “你一直都...
Chen Jie: It’s in October. We’ll go to the Great Wall. Oliver: Cool! I love the Great Wall! It’s in October. Why is the school trip usually in autumn? May. Jun. Apr. Jul. (为什么学校郊游在秋天?) ChenJie's school trip is usually in O__ct_o_b_e_r Mar. spring summer ...