INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade) VALUES (2021, 2, 4); INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade) VALUES (2030, 2, 3.5); INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade) VALUES (2021, 3, 3); INSERT INTO dbo.StudentGrade (CourseID, ...
Insert InsertIfNotExists Update Upsert Delete ExecuteRawSqlLaraue.EfCoreTriggers.PostgreSqlBasic usagevar options = new DbContextOptionsBuilder<TestDbContext>() .UseNpgsql("User ID=test;Password=test;Host=localhost;Port=5432;Database=test;") .UsePostgreSqlTriggers() .Options; var dbContext = new...
IF NOT EXISTS(SELECT * FROM [__EFMigrationsHistory] WHERE [MigrationId] = N'20201009100044_InitialCreate') BEGIN IF EXISTS (SELECT * FROM [sys].[identity_columns] WHERE [name] IN (N'Id', N'OrganisationId') AND [object_id] = OBJECT_ID(N'[Config]')) SET IDENTITY_INSERT [Config] ...
CREATE EXTENSION IF NOT EXISTS vector; 首先,我们使用上面的 SQL 语句来启用 pgvector 插件。此时,我们可以创建一张表来存储向量数据: CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3)); 接下来,准备若干条数据进行查询测试,可以注意到,这里的向量为三维向量: INSERT INTO items (embedding)...
針對EF Core 8,預設值現在是將地形清單當做包含 JSON 集合的單一參數來傳遞。 例如:none 複製 @__terrains_0='[1,5,4]' 查詢接著會在 OpenJson SQL Server 上使用:SQL 複製 SELECT [w].[Name] FROM [Walks] AS [w] WHERE EXISTS ( SELECT 1 FROM OpenJson(@__terrains_0) AS [t] WHERE CAST...
EF Core CRUD 上篇文章中,我们已经基本入门了EFCore,搭建了一个简单的EFCore项目,本文开始简单使用下EF,做增删改查的相关操作; 一、数据新增操作(C) publicstaticasyncvoidInsert_测试新增数据1() { var myDbContext = new MyDbContext();if(myDbContext.TestTables.Any(p => p.Id ==1))return; ...
`GameCode` varchar(10) CHARACTER SET utf8mb4 NOT NULL, `GameType`intNOT NULL, CONSTRAINT `PK_GameInfos` PRIMARY KEY (`Id`) ); Executing DbCommand [Parameters=[], CommandType='Text', CommandTimeout='30'] INSERT INTO `__EFMigrationsHistory` (`MigrationId`, `ProductVersion`) ...
Thedotnet-eftool must be installed before executing EF8 Core migration or scaffolding commands. To install the tool globally, use: Copy dotnet tool install --global dotnet-ef --version 8.0.0-rc.2.23480.1 If you already have the tool installed, you can upgrade it with the following command:...
The goal of the work-around is to ensure that EF Core will receive a ShippingAddress, BillingAddress or other owned type, whether or not the user supplied one. That means the user isn’t forced to supply a shipping or billing address just to satisfy the persistence la...
Thedotnet-eftool must be installed before executing EF8 Core migration or scaffolding commands. To install the tool globally, use: Copy dotnet tool install --global dotnet-ef --version 8.0.0-preview.4.23259.3 If you already have the tool installed, you can upgrade it with the following comma...