Zack.EFCore.Batch 中文文档 Chinese version Using this library, Entity Framework Core users can delete or update multiple records from a LINQ Query in a SQL statement without loading entities. This libary supports Entity Framework Core 5.0 and Entity Framework Core 6.0. ...
EF Core介绍 Entity Framework (EF) Core 是轻量化、可扩展、开源和跨平台版的常用 Entity Framework 数据访问技术,EF Core 是适用于 .NET 的现代对象数据库映射器...EF Core 通过提供程序插件 API 与 SQL Server、Azure SQL 数据库、SQLite、Azure Cosmos DB、MySQL、PostgreSQL 和其他数据库一起使用(微软官方...
{ "ConnectionStrings": { "DefaultConnection": "Data Source=(localdb)\\MSSQLLocalDB;Initial Catalog=EFCoreInsertRecords;Trusted_Connection=True;MultipleActiveResultSets=true" }} 3 向数据库中插入单挑数据 让我们展示一下如何在Department中创建一条记录,代码如下: var dept = new Department(){ Name = ...
-v [ --verbose ] be more verbose (include multiple times for more verbosity e.g. -vvvvv) --version print the program's version and exit -h [ --host ] arg mongo host to connect to ( <set name>/s1,s2 for sets) --port arg server port. Can also use --host hostname:port --ip...
EntityFrameworkCore extensions (performance improvement - into overdrive): -Bulk operations (super fast): Insert, Update, Delete, Read, Upsert, Sync, SaveChanges. -Batch ops: Update, Delete - Deprecated from EF8 since EF7+ has native Execute-Up/Del. -AddOp (additional): Truncate. Library ...
We’re using immutable records here, since these are a good match for the semantics of our complex types, but nesting of complex types can be done with any flavor of .NET type. NOTE We’re not using a primary constructor for the Contact type because EF Core does not yet support construc...
Having to delete or update multiple records in EF creates a huge performance bottleneck as essentially records are still operated on one by one. We solve this by mapping to stored procedures and first using xml type parameters and later user-defined table types. We wrote extensions that allow ...
vs2017 EFCore 迁移数据库命令 项目结构: 首先引用 Microsoft.EntityFrameworkCore.Tools Microsoft.EntityFrameworkCore.Design 增加类DesignTimeDbContextFactory 1 2 3 4 5 6 7 8 9 10 11 publicclassDesignTimeDbContextFactory : IDesignTimeDbContextFactory<QHContext>...
Once a new migration has been generated, it can be applied to a database in various ways. EF Core records all applied migrations in a special history table, allowing it to know which migrations have been applied and which haven’t.
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