Tag：Database
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Time：2021-4-23
This article is first published in the sample tutorial of. Net 5 /. Net core using EF core 5 (Entity Framework core) to connect mysql database to write / read data preface In the application development of. Net core /. Net 5, SQL server is often used as its database. The ORM components of. Net […]
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Time：2021-4-23
Problem description Eclipse project, SSM, front-end fill in the form (form element), submit the filled in Chinese “receiving address”, save to the database, there is the problem of Chinese garbled(the data table is garbled, and the data read from the database to the page is garbled) probably 1. Eclipse project coding format (this estimate […]
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Time：2021-4-23
In my spare time, I wrote an online customer service system with. Net core. And wrote a series of articles to introduce the development process . net core and WPF develop Sunway online customer service system: Contentshttps://blog.shengxunwei.com/Home/Post/44a31a32-d4e1-4ddd-8526-8a2bcd2e22be At the beginning, it was just written for fun to verify whether. Net core is OK or not. […]
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Time：2021-4-23
Installation of SQLite depends on react native SQLite storage version 0.60 or above, without manual operationyarn add react-native-sqlite-storage AndroidManifest.xml Add storage read permission to<uses-permission android:name=”android.permission.READ_EXTERNAL_STORAGE” /> <uses-permission android:name=”android.permission.WRITE_EXTERNAL_STORAGE” /> Using react native permissions Android API to apply for mobile storage access Use DB to open the database. If the database is opened successfully, the database […]
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Time：2021-4-23
We learned that beforeMybatisHow to configure and create a databaseSqlSessionHow to write it? How to write crud? The code is placed directly in GitHub warehouse【 https://github.com/Damaer/Myb… 】What needs to be declared is: thisMybatisLearning notes is from the originalMybatisStart, not integrate other frameworks (such asSpring）After that, I think that we can have a better understanding of […]
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Time：2021-4-23
Reading time |67 minutes word count |837.6 characters primary coverage |1. Introduction & background MSSQL view database encoding format Author | SCscHero Writing time | 2021/3/11 PM11:59 Article type |Series Completion |To be improved motto Every great cause has a trivial beginning. 1、 Introduction & backgroundCompletion: 100% a) Introduction firstRefute a rumorT-SQL, which is widely […]
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Time：2021-4-23
Source code:GitHub. Click here || Gitee. Click here 1、 Basic concepts 1. Single service All business services and application components are deployed on one service to save cost. This is a single service structure, which is suitable for the scenario of low concurrency and single business. 2. Cluster mode The business volume is gradually increasing, […]
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Time：2021-4-23
[tcapsusdb knowledge base] tcapsusdb backup and file back mechanism With the rapid development of e-commerce and office online, enterprises are more and more dependent on information system. Database, as the core of information system, plays an important role. For the database, due to the huge amount of data and very important, every data loss may […]
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Time：2021-4-23
select DATE_FORMAT(dtl.transdate,’%Y-%m-%d’) as transdate, right(DATE_FORMAT(concat(transdate,transtime),’%Y-%m-%d %H:%i:%s’),8) as transtime,dtl.custname,dtl.stuempno,dtl.deviceid,dtl.devtype,dev.devicename,a.names as areaname from t_devicedtl dtl left join t_device dev on dev.deviceid=dtl.deviceid left join t_area a on a.id=dev.areaid DATE_ FORMAT( dtl.transdate , ‘% Y -% m -% d’): for example, format the transdate field 20200123 in the database, and the result is: 2020-01-23 DATE_ Format (concat (transdate, […]
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Time：2021-4-23
In use of micro engine database operation of its own functionLike PDO_ insert pdo_ update pdo_ Delete, etcIn the case of this situation, I found the reasons after I finally solved it: “Wrong data table field…”For example: $data[‘id’]=1; $data[‘title’]=’2222′; pdo_insert(‘user’,$data); In the database, it’s not title but name. Here it should be $data [‘name ‘]. […]
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Time：2021-4-23
There are two ways for beginners to learn “laravel”. One is to fill the program into the MVC framework obediently, resulting in the abnormal hypertrophy of “controller” and “model”, which is difficult to maintain in the future. The other is often hesitant to know which “class” the program is rewritten in. After all, traditional “PHP” […]
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Time：2021-4-23
preface: When using the database temporarily, you can use docker to run, which can prevent the environment from being damaged by the installation on the system. At the same time, using docker to start will be faster than installing and configuring in the system, which can be said to be the fastest way to install, […]
