best java orm framework

configuration seconds kill everythingEF advanced 1. Learn LINQ to SQLLINQ to SQL Syntax rollup2. Learn ExpressionLINQ Expression Advanced Article3. Optimization testEF query performance test for millions dataA simple class libraryProjectData.map related EntitytypeconfigurationRelated entities in Data.moduleHere's the Efcontext and Efdatabase class.Using system;using system.collections.generic;using system.data.entity;using System.Data.Entity.ModelConfiguration ; using system.linq;using system.r

First, Introduction Ormlite is a database framework, which allows us to quickly implement database operations, avoid frequent handwriting sql, improve our development efficiency, reduce the chance of error.First you can go to its official website to see www.ormlite.com, its English full name is Object Relational Mapping, meaning is object Relationship mapping ; If you have any contact with Java EE Developme

Membercontroller extends jvncontroller{public void Save () {member member = new M Ember (); Member.set ("Name", "Everxs"); Member.set ("Age"); Member.save (); Renderstring ("Add success!") ");}}Result: The database was saved successfully.about JVN:Framework named JVN, the blog has a continuous development of video, each blog is a knowledge point, about the framework of the introduction and learning, from my blog first start to look at;The source and

1. Description This project is a lightweight, Dapper-based ORM framework, developed using. NET Standard 2.0, that includes a basic crud and a way to do something based on an expression that is currently only for a single table and does not include multiple table join operations.Github:github.com/iamoldli/netsql2, the use of method 2.2, installation Install-Package NetSql2.2. Create an entity Create an Artic

Tags: image connection inf Two kinds of PNG this line of storage Tcl HubFirst, there are two ways to introduce Sqlsugar to a project:1) Use the NuGet guide package directly2) GitHub download source code, then project referenceThe second is chosen here.After the introduction of success, we need to configure the environment according to their own habits, such as database connection string How to put, how convenient to use Sqlsugar for crud.First look at the database connection string, I put it in

Tags: Need SQL next SYS technology to share UI Web load GESThe installation process is simply carried over: 1. Before looking at the code, we need to load npgsql and Petapoco into the current project, and I will use NuGet to add to the current project as follows: Install-package Npgsql Install-package Petapoco 2. Take a look at the important code in Web. config 1> Database Connection string "Postgresql" connectionstring= " server=127.0.0.1; User id=postgres;password=123;database=mono_test; " p

= new Integer (10.2); Entity.mlong = new Long (system.currenttimemillis entity.mstring = new String ("test");d B.save (entity);2. DeletelistDelete all//Db.deleteall (Entity.class);Conditionally Delete//Db.deletebywhere (Entity.class, "");3. Updatelist4. Enquirylist5. Delete a tableDb.droptable (Entity.class);6. Add 1000 data, add transactionBegins a transaction. Improve efficiency (no transactions, insert 1000 data may take more than 10 seconds, with transactions may be less than 1 seconds, dep

Data Relationship mapping: ORMO:objectR:relationM:mappingThe operation of the database is the equivalent of manipulating the database by encapsulating it into the object and manipulating the object.Installation:NPM Install MongooseUsage examples:Const Mongoose=require (' Mongoose ')1. Connect to the databaseMongoose.connect (' mongodb://127.0.0.1:27017/edu ')2. Design the model structureConst Catschema=mongoose. Schema ({Name:string,Age:number})3. Create a model based on the model structure,Cons

This article details the instance code of the Python ORM Framework SQLAlchemy Simple Application (Database operation) #_ *_coding:utf-8_*_ "To create a SQLAlchemy application basic procedure 1, create a connection (and a relational database to create a connection) 2, declare a mapping file (Python-to-class and database tables do a one-to-one mapping, This allows you to manipulate the tables in the database

Laravel's EloquentORM provides beautiful and concise ActiveRecord implementation to interact with databases. Each database table interacts with a corresponding "model. Before you start, remember to set configdatab Laravel's Eloquent ORM provides beautiful and concise ActiveRecord implementation to interact with databases. Each database table interacts with a corresponding "model. Before you start, remember to set config/datab Let's generate the

proceduresFor stored procedures, is also a topic to be said, our dapper can also be executed, just need to be in the query in the CommandType to mark the current is aStoredProcedure is sorta, such as creating a simple storedprocedure on the users table now.Use [datamip]go/****** Object: StoredProcedure [dbo].[ Sp_getusers] Script date:09/02/2016 09:14:04 ******/set ansi_nulls ongoset quoted_identifier ONGOCreate proc [dbo].[ Sp_getusers] @id int as begin SELECT * from Users where Use

(Objectsender, EventArgs e) { intID =1;//get the ID of the book you need to editBook Book1 =NewBook {ID=ID, Name=@"Modify Name", Txt=@"Modify TXT" }; Dbhelper.update (BOOK1); } /// ///Delete a specified book/// /// /// Private voidBtndel_click (Objectsender, EventArgs e) { intID =1;//get the ID of the book you want to deleteDbhelper.delete (ID. ToString ()); } }}5.Cannot upload the attachment, need source c

product table to sell Number +1, Stock count-1 with transaction.atomic (): #开启事务处理 #创建一条订单数据 models. Order.objects.create (num= ' 123456789 ', product_id=1,count=1) #去产品表 sell number +1, stock 1 (Error) models. Product.objects.get (id=1). Update (inventory=f (' Inventory ') -1,sale=f (' sale ') +1) #能执行成功 #model S.product.objects.filter (id=1). Update (inventory=f (' Inventory ' -1,sale=f (' sale ') +1)) except Exception as E: P Rint (e) # Do not open transactions# try:# # Create

Tags: logs install color sel lap Body DESC Log CallReference blog:Http://www.cnblogs.com/wupeiqi/articles/5713323.htmlHttp://www.cnblogs.com/wupeiqi/articles/5716963.htmlContent review: Reference Blog: http:www.cnblogs.com/wupeiqi/articles/5713323. HTML http:www.cnblogs.com/wupeiqi/articles/5716963. HTML Content review:1. What is a database2. MySQL installation3. User Authorization4. Database Operations-Data Sheet-Data Type-whether it is possible to empty-Self-increment-PRIMARY Key-FOREIGN Key-U

database file does not exist, it is created by default. Additionally, the c++11 shared_ptr,g++ is used here to add parameters-std=c++0x Insert object:[CCE lang= "CPP"]{Odb::transaction T (Db->begin ());Volumeid = db->persist (volume);T.commit ();}[/cce]When inserting, the transaction is used, the ODB/TRANSACTION.HXX header file needs to be introduced, and the life cycle of the transaction is minimized. Generate the corresponding code with the ODB command:[CCE lang= "bash"]Odb–database sqlite \–

JPA Overview The JPA (Java Persistence API) is the standard ORM specification for the Java EE 5.0 platform and will be supported by all Java EE servers. By absorbing the experience of the previous EJB spec failure, Sun has gained an easy-to-use, scalable ORM specification b

Java Micro ORM equivalent [Closed]ask Question Up vote vote favorite What would is the closest equivalent in Java to a Micro ORM such as Dapper, Petapoco, Massive or C Odinghorror? Java subsonic dapper Petapoco massive sha

This is the last piece of Java talk, to the ORM framework of the end of the discussion, but also to the last part of the Java EE to cover, the reason is so late to sum up the ORM this aspect, one is the author of these two weeks busy, on the other hand also want to finish, c

performance, and we can analyze it through the statement log of the database service. Many o/rm can automatically generate table schema (automatically generate tables) based on mapping instructions, but we should not do so, especially in production environments or products, remember that we should design our own tables. If the table design is poor, it is your fault, not o/rm. Java Persistence API There are a number of O/RM products, such as top Link

application can simplify complex tasks such as data migration and operations. You can also use JavaScript programming to manage MongoDB. In this article, we will demonstrate how to use the console. There are many MongoDB client products, all of which have the quality to put into the production environment. The MongoDB community also calls them drivers. In general, each programming language has its own drivers that cover all the popular programming languages, and some are not very popular progra