EF Core 7.0 舊版 c# context.Database.ExecuteSql($"UPDATE [Employees] SET [Salary] = [Salary] + 1000"); 若要深入瞭解SaveChanges與ExecuteUpdate/ExecuteDelete之間的差異,請參閱儲存數據的概觀頁面。 其他資源 訓練 模組 使用EF Core 保存和擷取關聯式資料 - Training ...
EF Core 可讓您輕鬆地查詢實體實例,然後在程式碼中使用這些實例。 不過,查詢實體實例經常會從資料庫提取超過必要資料。 請考量下列各項:C# 複製 await foreach (var blog in context.Blogs.AsAsyncEnumerable()) { Console.WriteLine("Blog: " + blog.Url); } ...
Breaking changes in EF Core 9.0 Getting started Releases and planning (roadmap) DbContext configuration and initialization Create a model Manage database schemas Query data Save data Change tracking Logging, events, and diagnostics Testing Performance Introduction Performance diagnosis Efficient querying Effi...
Notice that EF created a constant in the SQL for ".NET Blog" because this value will not change from query to query. Using a constant allows this value to be examined by the database engine when creating a query plan, potentially resulting in a more efficient query....
We may optimize the SQL around OPENJSON to make querying more efficient. How to get EF8 Preview 4 EF8 is distributed exclusively as a set of NuGet packages. For example, to add the SQL Server provider to your project, you can use the following command using the dotnet tool: ...
-Batch ops: Update, Delete - Deprecated from EF8 since EF7+ has native Execute-Up/Del. -AddOp (additional): Truncate. Library is Lightweight and very Efficient (warp speed), having all mostly used CRUD operation. Was selected in top 20 EF Core Extensions recommended by Microsoft. Latest ...
是指在使用Entity Framework Core(EF Core)进行数据查询时,可以通过一些方法来忽略某些条件,以便在查询结果中排除这些条件。 在EF Core中,可以使用以下方法来实现忽略条...
eftool = Efficient + Tool,Efficient是高效的表示,Tool表示工具。 📦安装 🍊ohpm 执行安装命令 ohpm install @yunkss/eftool 升级说明 2.0.0版本升级改动较大,升级需要保持充足时间 升级内容 1.去除强绑定OutDTO 2.efAxios增加统一异常处理 3.efRcp全面重构 特殊说明 eftool拆分后默认保持全量包 ef...
While ExecuteUpdateAsync and ExecuteDeleteAsync are commonly used to update or delete many rows at the same time (i.e. “bulk” changes), they can also be useful for efficient single row changes. For example, consider the common pattern to delete an entity in an ASP.NET Core application: ...
-Bulk operations(Insert, Update, Delete, Read, Upsert, Sync, SaveChanges) -Batch ops (Delete, Update) andTruncate. Library is Lightweight and very Efficient, having all mostly usedCRUDoperation. Was selected in top 20EF Core Extensionsrecommended by Microsoft. ...