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Migration database is often encountered in work.If you use phpmyadmin to import, you can solve the problem if the database is too small. If it is too large, it will be troublesome. Either it will time out or the file is too large to import.So I chose to use Navicat For Mysql to copy the database In this process, I often encounter a problem: ERR ...

Article synchronization from http://javaexception.com/archives/34 How to add and share the function of Youdao cloud notes to your app Question: An open source notebook project before Leanote In, a user feedback wants to add the function of sharing to Youdao cloud notes, so that they can share their millet notes or other Notepad contents to t ...

In mongoDB database, the time is saved as ISODate type, and orm relationship is mapped as java.util.Date type. The time saved is 8 hours earlier than that of us The original data is: Person [id=11188, name=doctorwho, age=888888,birth=2016-01-01 13:55:00] In MongoDB database: { "_id" : "11188", "_class" : "com.doct ...

Setup of LAMP Environment Install DNS Server Install DNS Service yum install bind -y Configuration of DNS Create Forward Resolution For example, create a forward lookup zone named "lsy.com": Step 1: Create a lookup zone in the main configuration file/etc/named.conf. vim /etc/named.conf listen-on port 53{any ...

To implement JWT certification with php, let's first understand what JWT is.What is JWTJWT(json web token) is an open JSON-based standard implemented to pass declarations between network applications.JWT's declarations are typically used to transfer authenticated user identity information between identity providers and service providers in orde ...

Record a series of errors after modifying the size of sga once After modifying the sga size of oracle, we encountered a series of errors. 00844 and 00851 error reporting SQL> startup; ORA-00844: Parameter not taking MEMORY_TARGET into account ORA-00851: SGA_MAX_SIZE 2147483648 cannot be set to more than MEM SQL> 01078 error reporting SQ ...

Forwarded from https://www.cnblogs.com/shenzikun1314/p/6604867.html#4262295   First, the basic theory to understand is whether the relationship between users, roles and privileges is one-to-many or many-to-many.From this, the table is created.   A user can belong to multiple roles, such as Dunchao.He is Sun Li's husband, his child's father, o ...

Mybatis Source Parsing (IV) - How does SqlSession implement database operations? _If you use a database request operation as a comparison, the first three articles are preparing for the request, and the real operation is what this article will tell you.As with the title, the most central point of this article is that SqlSession implements sourc ...

Basic concepts of databases Data: Symbolic records describing things are called data. Include numbers, text, graphics, images, sounds, file records, etc. Store in a uniform format as a "record". Table: A table is formed by grouping different records together Is used to store specific data Database: A database is a collection of ...

Label PostgreSQL, spatial aggregation, spatial heat map, administrative region, electronic fence background For a certain time interval (or other conditions), how many objects (space point information) appear in some fences and administrative areas (polygon information), and render these polygons by color depth. for example Example 1. Are ...