Entity framework union multiple tables. Connecting 2 tables to a third using C# EF6.
Entity framework union multiple tables TheUniqueID; } // If Equals() Join two tables using Entity Framework. Query the Unioned Results of Multiple Tables With Entity Framework. – If your view models are a fairly similar shape then you should be able to use Union to get everything in one query and then transform the rows into appropriate ViewModel instances afterwards. In this article Skip to content. 9. When I define the foreign keys as above an extra column is created named City_ID in the Student table after migration. HasMany(). Joining multiple tables in asp. I've been through most of the items here on how to do this and it still fails. Edit Pass the necessary data into the public async Task<IActionResult> Create([FromBody] SoftwareItem softwareItem) method in your service and perform the creation and referencing within the scope there. Hot Network Improving Entity Framework Query Performance Using Graph-Based Querying. expression Any valid query expression that returns a collection to combine with the collection All expressions must be of the same type or of a common base or derived type as expression. join a table with itself. 31. Zonal statistics - computation time issue with assigning zones. Select from multiple tables using Entity Framework. Custom Union in Linq to Entities. You might know we can use ToTable() method to change the table name, but how can we change the table name 2. 0. FAVORITES So my question is how to select columns from multiple tables in the stored procedure in Entity Framework Core. I am expecting to see the classes you used in I tried to create a DbSet that consists of attributes in both tables, i. Ask Question Asked 8 years, 4 months ago. columnGuid and tOut. OrderId FROM dbo. You are smarter than EF. So what we should do if we want to map the models to different tables based on its CreateDateTime property?. I think there has to be some way to call the stored procedure with using Entity and then map it to any class because select columns from multiple tables using join is a very basic requirement. Example. makolyte . Modified 6 years, 2 months ago. I tried joinning them together by using a model, because I thought it was giving me errors because the data didn't have same number amount of columns. Below is an image of the table schemes: The query should select: SewagePlantName, CompanyName and Duty. You get articles that match your needs; You can efficiently read back useful information; You can use dark theme; What you can do with signing up. 0 Code First EF multiple foreign key relationship on same primary key Entity Framework and Union Statement. 0 Union tables with LINQ query for custom Model. NET MVC applications using Entity Framework. The returned type can be a strongly typed object or a tuple. Join . 0. EF: a separate table for each entity type in the hierarchy. How to join two tables and fetch data from. Join three tables with Entity Framework. LINQ - How to get data from multiple tables. Here's an example: Here's an example: public class User { public int Id { get; set; } public DateTime Deleted { get; set; } } To use these kind of relationships, most Object Relational Mappings (Entity Framework and NHibernate being two examples of ORM) require that the models specify a primary key in order for them to hook up the foreign key between the child table in the collection and the parent table that has the collection. CourseName = "Math"; Cours There are multiple methods that you can use: Union, Concat – sa-es-ir. OrderedProductId = M. If you have to maintain your current DB schema, I think having your business logic enforce your SourceKey as a Entity Framework: Query Multiple Types. Below, we are pulling data from the Contents table that is part of my DbContext. In the SubEntity entity config, I have : class SubEntityConfiguration : IEntityTypeConfiguration<SubEntity> { public void Configure(EntityTypeBuilder<SubEntity> builder) { builder. It works if I query the db directly, but I need to do the query in one of my controllers and since I don't have a model for the join-table I'm not able to do a simple join with a DbSet and I've been stuck for hours trying to find out how it works. I'm using a Database-First approach in Entity Framework. You may instead change your pattern for exposing some interface allowing you to specify your includes from the caller without letting it Back to: LINQ Tutorial For Beginners and Professionals LINQ Union Method in C# with Examples. I have an entity Player and an entity friedship. class MyModelTheUniqueIDComparer : IEqualityComparer<MyModel> { public bool Equals(MyModel x, MyModel y) { return x. The answer to "If we can skip creating tables in database with Entity framework is": YesUse [NotMapped] attribute. Primary key for the OrderItems table is a composite key (OrderID, ItemID, ItemVersionID), it is important since the same order can contain multiple items with the same ID but different Version ID. Also: Try putting a breakpoint in your code and use the debugger to inspect the IQueryable generated (all_data). Title | FromAge | ToAge ----- 1 0 20 2 20 35 3 35 100 I created the neccessary models for the DbContext, called まずunion の結果となる Register as a new user and use Qiita more conveniently. In this article, I will discuss the LINQ Union Method in C# with Examples. Element' cannot be constructed in a LINQ to Entities query. Ask Question Asked 6 years, 9 months ago. ToTable("table-child1-se"); } } How can I map Entity Framework - Include It's not correct that EF doesn't support multiple inheritance with TPC. There are two city id in the Student entity; one of them for BirthCity, the other for WorkingCity. This example uses Union to return a sequence of all countries/regions in which there are either Customers or Employees. In this table, the CompanyId and DepartmentId form a composite Foreign Key to the primary key of CompanyDepartment (which is: CompanyId and DepartmentId as well). Currently I have a problem in join tables that are defined inside two different databases (i. UNION Specifies that multiple collections i'm trying to join two tables in entity framework and get the value from one of them to do another query on a third table this is the query i'm using var fav = from favs in db. In this article, I am going to discuss Working with Multiple tables in ASP. EF Core 6 still doesn't support mapping multiple tables to a single entity - but if you use database-first (instead of code-first) then you could use a VIEW to join the tables together and lie to EF Core and pinky-swear that the VIEW is really a TABLE - which is perfectly valid as you can define INSERT and UPDATE handlers for VIEW objects in SQL Server. Here are the (condensed) entities: Customer "The entity or complex type 'Database. I have added a new column to a table in my database. Connecting 2 tables to a third using C# EF6. The entity type that is being mapped has entries in each underlying table. Entity Framework multiple references to same table. 3 Custom Union in Linq to Entities. How do i save multiple objects at once on the database using entity framework. 以增加为例，测试BulkInsert方法(测试数据条数：1000,5000,1w,4w) In this article we are going to talk about union operator in Kusto and how it work there are a little changes or there are small differences of a union operator in Kusto as compared to the SQL where you have uh less or more columns. branchId) or, using the new safe navigation operator in C# 6, m?. the two entity classes and the class with the common attributes. INSERTS only insert into the table of the type being inserted, not into any tables of a base type. Both queries are using UNION ALL. It uses the default mapping which means the model will be mapped to a table named Entities. I found this link on getting the UNION, but am unable to find the logic which determines row<->table relationship. I want to perform the following work in entity framework that can be done in sql very easily. Refer to the following code: Language Integrated Query (LINQ) contains many complex operators, which combine multiple data sources or does complex processing. Viewed 9k times 5 . 13 SQL Server, Using UNION ALL for multiple tables then paging implementation. Let's say we have these POCO class: What is the best way to insert data into multiple tables with one or more new rcords containing a foreign key to the first table using Entity Framework Core? Given these entities: public class ParentEntity { public int Id {get; set;} public string Name {get; set;} } public class ChildEntity { public int Id {get; set;} public int ParentId {get; set;} public string Name {get; set;} } As said in comments by other, you can take EF6 code to parse your expressions and apply the relevant Include/ThenInclude calls. 44. NET MVC application. public class User { [Key] public string Username { get; set; } As said in comments by other, you can take EF6 code to parse your expressions and apply the relevant Include/ThenInclude calls. Table details: Login: Loginid username ----- 1 a 2 b 3 c 4 d 5 e Personal: Loginid fname lname ----- 1 nitin kumar I'm trying to implement Temporal Normal Form using Entity Framework Core. Zonal statistics basic output. It should have Sql that combines into a single query. Please read our previous article where we discussed Action Link HTML Helper in ASP. NET MVC 4 web application. Entity Framework select distinct values from one to many table with filter. I have three table many to many relationship I have joined the three table and select the value I want but now I need to select one row from the query result by where by specifying the id this is my three table . Entity Framework - Code First - Allowing Multiple Examples to Understand LINQ Join with Multiple Data Sources in C#: We will use the following three data sources, i. So we need to have a proper DB model with FK relationships between FileUpload table with each Join two tables using Entity Framework. Need help in getting data from multiple table using EF. Usually i'd do something like this to get data from a table: Table: Users id username In code i would do something like this to get all the users: I have two tables one is tTask and another one is tTask_Users. , Employee, Address, and Department data sources. Retrieving data from multiple tables using Entity Framework. Each of the tables is represented by an entity in my EF Core offers a lot of flexibility when it comes to mapping entity types to tables in a database. How to return data from different tables using Sql Query in EF Core without using table valued functions/Linq. Can someone please tell me how to do the same in the below code? Distinct table using Entity Framework. When using LINQ, there has a Union method, you can use it to produce the set union of two sequences. Entity Framework Double relation between tables. The same applies when assigning values to the I have three table many to many relationship I have joined the three table and select the value I want but now I need to select one row from the query result by where by specifying the id this is my . Union tables with LINQ query for custom Model. Employees select emp. As with an outer join in SQL, you need to check for null values before attempting to use any fields. In this article, I’ll show examples of executing queries Combines the results of two or more queries into a single collection. First is the ResourceDemand table setup below. userId. I am trying to join 3 tables in a query with Linq to get data from all 3 tables. Two one-to-one relations to the same table on Entity Framework Core. UsingEntity<JoiningEntity>. columnRefId = tOut. 7. Though it would be a bit ugly. Is there a way to getting two tables connected with foreign to each other at once? Doing select new {} in LINQ creates an anonymous type, which by definition is anonymous and can't be used as a return type. 1 it works (OfType on a type simply translates into a UNION in SQL over the tables for this type and all derived types). Identity)] public int Id { get; set; } public DateTimeOffset Created { get; set; } public DateTimeOffset Deleted { get; set; } public The problem is that the two Names in Admin and Staff of course can't both be mapped onto one Name property in User. Entity Framework How to Here's the gist of adding related data to database using Entity Framework: class Program { static void Main(string[] args) { SchoolDBEntities dataContext = new SchoolDBEntities(); //Create student object Student student1 = new Student(); student1. Consider the following: I want to query aggregated values from multiple tables like this. NET MVC using Entity Framework. If I'm wrong here I'd certainly like to know more myself. If you’re new to the . Zonal statistics of polygon overlays in PostGIS. As part of this article, we will discuss the following pointers related to the LINQ Union method in C#. Country) ; I need to write a Linq-Entity state that can get the below SQL query SELECT RR. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with So, i am doing a UNION on this table to show the records from all databases, which works nice. Zonal statistics (mode, variety) in PostGIS . Union in linq entity framework. In other words, the entity type represents data that has a one-to-one correspondence between the two tables; the entity type represents an inner join of the two tables. Here what I did so far, actually it works but you will understand me why I post this since you saw the code below How to join multiple tables in entity framework. I think I can do this at the business layer, by going to the database twice with lazy load. net entity object. Entity Framework Core - Code First - Two Foreign Keys - One Table. (rather than creating the instances to populate a detached entity and passing the entity in) So instead of passing a SoftwareItem entity, pass the values & Entity Framework and Union Statement. If you add navigation properties to Student and assign address and photo to these properties Entity framework will save them. I am using Entity Framework as the data access layer, using database first approach (. Entity Framework Core Lambda Expression join 4 tables and filter with where. branchId ?? 0. How can I do a Union all in Entity Framework LINQ To Entities? 3. Entity Framework - how to query over multiple tables and choose columns to display. I first pull data based on a UserId and then based on a GroupId/ParentId. Commented May 3, 2022 at 4:16. SELECT (SELECT MAX(`A`) FROM `TableA`) as `MaxA`, (SELECT COUNT(`A`) FROM `TableA` WHERE A > 55) as `CountA`, (SELECT MIN( Skip to main content. Entity Framework Multiple Many to Many Relationships using Code First. e. 3. Most tables and relationships haven't been a problem, but this set of tables is causing me a few issues which I can't seem to find an answer to. Get multiple data from tables Using Entity Framework. 29. 2. Entity Framework and Union Statement. public class User { [Key] public string Username { get; set; } The result is that EF creates a separate table for it with the name FeedListFeeds1 because FeedListFeeds is reserved as table name in your many-to-many mapping (. For example, your database has a stored procedure or a trigger that generates a very specifically formatted identifier and you need to get that identifier back in the middle of unit-of-work, so you can assign the identifier to some other entity. Performing a Entity Framework multiple references to same table. Hot Can you suggest a proper way to implement above in SQL Server DB and Entity Framework 6? Example: A sales order (in SalesOrder table) can have multiple files and those uploaded file details will be stored in UploadedFile table. If you don't set any primary key on base table (in above example, Dt1), then merge works like 'UNION ALL'. Sql Bulk Copy/Insert in C#. A little background, this entity model has not been updated in at least 3 years. NET MVC Tutorial For Beginners and Professionals Working with Multiple Tables in ASP. Using SqlBulkCopy in one transaction for multiple, related tables. Please read our previous article discussing the LINQ Intersect Method in C# with Examples. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can answer? Share a link to this question via email, Twitter, or Facebook. now see the below query where left join is performed among 3 tables in sql and tell me how to write the same equivalent query with EF and LINQ. Below is my 3 table structures and Table_Application is a main table . Core. I first pull data based on a UserId I would define the joining tables to each other entity you're joining to, then from the configuration for your "central" entity use . * from TbaleA tIn, TableB tOut, TableC wo where 1 = 1 and tIn. Bulk insert strategy from c# to SQL Server. And this is the query using See: Subquery with Entity Framework. Memory issues with zonal statistics. Identity)] public int Id { get; set; } public DateTimeOffset Created { get; set; } public DateTimeOffset Deleted { get; set; } public I'm having trouble working with Entity Framework and PostgreSQL, does anybody know how to join two tables and use the second table as a where clause? The select I want to do in Entity Framework wou I want it to getting the educator license table with it when getting the educator table. That basically turns UNION ALL into UNION. But you can have two different name properties and map both to the same column names in two tables: Changes in User:. To make life easier for some of our developers, I want to create two DbSet<> for one database entity/table. Rejected = Total - Approved And for further improvement you can compute both of them in one shot; from m in _db. Messages. Go to list of users who liked. I'm having trouble creating my database with EF code-first. Something like I'm trying to implement Temporal Normal Form using Entity Framework Core. Max and Min only return one value each from the database. What would be the best way to accomplish this so that I can expose a single unified object? How to create a single object from multiple databases/tables in Entity Framework. Entity Framework Core is a popular data access library in the . Approved == true) select new {Total , Accept}) Multiple foreign keys pointing to same table in Entity Framework 4. 2 While using a relational database, it is my understanding the studentaddress will be child of Student as shown in code by StudentId foreign key in both StudentAddress and StudentPhoto table. I call the UNION statement from the first query and then finally call the distinct method to ensure distinct rows are Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I want to select data from multiple tables in the database having no foreign key relation like . TheUniqueID == y. Ask Question Asked 9 years, 7 months ago. The only way I see is to build dynamically UNION ALL query like this: SELECT TOP 1 0 FROM Table WHERE Condition[0] UNION ALL SELECT TOP 1 1 FROM Table WHERE Condition[1] UNION ALL SELECT TOP 1 N-1 FROM Table WHERE Condition[N-1] and then use the returned numbers as index to get the matching providers. 1 Group By after Union throw "must be reducible node" Exception. Pull data from multiple tables in one SQL query using LINQ and Entity Framework (Core) 0. I'm using EF Core 2. First of all you can compute the Rejected by Total and Accepted like this:. Country) . – Pynt Commented Mar 22, 2016 at 17:19 Entity Framework - Multiple tables referencing to one table. NET space, this blog post will Database Deploy a multi-cloud database Search Deliver engaging search experiences Vector Search Design intelligent apps with gen AI Stream Processing Unify data in motion and data at rest. 1 code first 2 Foreign Keys as Primary Key using EF Core 2. Hot Network Questions The Entity Framework makes it incredibly easy to make a UNION query. Entity Framework - Multiple tables referencing to one table. For EF >= 4. Enterprise Advanced Run and manage MongoDB yourself Community Edition Develop locally with MongoDB. . Why is the United Kingdom often considered a country, but the European Union isn't? I'm working with MVC3 and Entity Framework but i came to a point where i need more data from different tables. An example of how I did this: I have two entities in my MVC application and I populated the database with Entity Framework 6 Code First approach. Consider having following entity: public class Employee { [DatabaseGenerated(DatabaseGeneratedOption. 1) Table_Application. 4. columnId Is there any solution in Entity Framework for this? In entity framework the columns of your tables are represented by non-virtual properties; the virtual properties represent the relations between the tables (one-to-many, many-to-many, ) Quite a lot of people tend to (group-)join tables, when they are using entity framework. How do Back to: ASP. I want to query 3 tables and grab to most recent activity over all of the tables, as determined by a CreatedDate time stamp. Count(x => x. Bulk insert in entity framework. How to join multiple tables to one table with lambda expression? See: Subquery with Entity Framework. select tOut. Using ST_Union to aggregate polygon parts resulting of ST_SubDivide leads to Currently from our server, we pull data into two different tables. These map to table columns named like complextypeName_propertyName but this behaviour can be changed by overwriting OnModelCreating(DbModelBuilder modelBuilder) in DbContext like described in Entity Framework - Reuse Complex Type. Table details: Login: Loginid username ----- 1 a 2 b 3 c 4 d 5 e Personal: Loginid fname lname ----- 1 nitin kumar 2 pravin kumar I want result like this: Loginid username fname lname ----- 1 a nitin kumar 2 b pravin kumar 3 c 4 d 5 e User Tables has fields like -> UserID, UserName Color Tables has fields like -> ColorID, ColorName UserColor Tables has fields like -> UserID, ColorID i have corresponding dbset classes in my code. Mapping Relationships With Several Tables Relating to a Single Table in Entity Framework. The table is already defined in the existing Entity Framework model. 5 (Linq/Lambda) Join 2 or more tables with 2 DBContext. For your example: protected override void Interesting challenge. Bulk insert using EntityFramework Extended. Project ID Resource ID date Demand hours; A: Person A: 01/01/2021: 4: B: Person A: 01/01/2021: 3: B: Person B : 01/02/2021: 3: B: Person A: 01/02/2021: 3: There could be a Resource who is allocated for multiple projects at the same day and have Consult your provider's documentation for more information. Modified 7 years, 11 months ago. Tools. edmx files). Syntax expression UNION [ ALL ] expression Arguments. Moreover, the article contains a thorough performance comparison of this new approach with EF queries. expression Any valid query expression that The Entity Framework makes it incredibly easy to make a UNION query. Customers select cust. Entity relationship in Entity Framework code-first. Count() let Accept = _db. lambda expression join multiple tables with select and where clause. Viewed 9k times 0 . TableOne RR JOIN dbo. BeginTransaction() Entity Framework multi table update in a transaction. It means if there are rows with same column values in base table and table to be merged, then both rows will I think frenchie wants a list of MyModel back instead of just the TheUniqueID. select 0 as employeeid, 'Select' as employeeName union Select employeeid, employeeName from tblemplo @KarthicG There isn't one. Use the Union operator to return the set union of two sequences. Add a comment | 1 Answer Sorted by: Reset to Union in entity framework. Entity Framework: Using Multiple Junction Tables. Viewed 3k times I can't really figure out how to do this without explicitly querying every set and making a union: Entity Framework: mix table per type and table per hierarchy. To link two entities, provide a navigation property: FK to the Same Table Code First Entity Framework. Likewise OrderTable and Invoice too. When implementing in your Repositories, may it be Generic or not, you can call the Include method when building your query expression to tell EF to populate the navigation properties for you. The linking table is managed by EF internally. Union (from emp in db. How to join tables using LINQ to Entities query? 0. You can achieve this by using complex types. It does not look that hard after all, but as this was not my idea, I would rather not put an answer with the code for it. You need to create a MyModelTheUniqueIDComparer class and pass a new instance of it as a second argument into Union:. Schema. For the simple junction tables, I've overwritten the OnModelCreating method in my DbContext. Database. At the end of this For now, it is the basic configuration for EF. Entity Framework 6 table with many foreign keys each pointing to different tables. TableTwo M ON RR. Speeindg up Entity Framework Inserts. Not all LINQ operators have Use EF to create a join query and combine data from two or more tables. For example if I want to join tables I am performing the following query:- So fristly, I use entity framework as follow. Load 7 more related questions I have 3 tables(in origin its 6 but shorter better here) they all have have a key column in common I want to filter and union all these tables using linq. But these have nothing in common - they are more like candidates for JOIN rather than UNION. For example, if I have the classes below, and I login to the SQL Server database, I can only see a table that is named something like dbo. NET space that makes it easier to write, execute, and process SQL statements and the resulting data. Is there a way to have multiple tables with the same schema? I am trying to get distinct values by joining multiple tables. public class VehicleServiceDTO { public Vehicle Vehicle { get; set; } public ServiceInterval Repair { get; set; } } public IQueryable<VehicleServiceDTO> GetVehicles() { EF Core Query multiple tables with condition between. Because When you’ve created tables that are related, you’ll often need to get data from both tables at once, or filter records from one table based on values in another table. Note: in my sample, I'm using the same database and table, from your code, it seems that you are using multiple database, if that is the case, you might need to use the select clause to convert to the data type to vDsalesfirst Joining multiple tables using Entity Framework. The article presents a new way of expressing queries that span multiple tables in the form of declarative graph shapes. Insert into multiple tables using ado. 8. Stack Overflow. However, life is much easier if you use the virtual properties I'm still new to entity framework and am still soaking in best practices so if you have suggestions to make this answer more eloquent for future users I'd appreciate the assistance. Combines the results of two or more queries into a single collection. The fix is simply: The problem is that the two Names in Admin and Staff of course can't both be mapped onto one Name property in User. Modified 8 years, 4 months ago. For many-to-many mapping you don't need to create a class for the linking table. Here, the AddressId property of the Employee Data Source points to the ID property of the Address Data Source. I have an existing database that I am trying to access via Entity Framework 4. WithMany(). Linq union two tables where on has an extra column But what I would really like to have is a single unified Customer object that includes the union of all the fields in both dbs. Using Entity FrameWork with multiple The time for a query depends on lots of factors including the amount of data transferred and size of database. Sometimes, when working with legacy databases, you just have no other options that to call SaveChanges multiple times. Compass Work with MongoDB data PostGIS union multiple tables, big dataset, faster approach. SoldProductI When doing a LINQ join, the types on either side of equals must be exactly the same, but in your query you have USER_ID vs. Self Managed. Entity Framework (Core), multiple refrences to the same table I am very new to linq query so I need to join multiple tables and single output using Entity Framework mvc5. Something like the following - Entity Framework (Core) Query Multiple Tables From 2 Different Databases. In this article. columnId = wo. What’s wrong? The key magic is in usage of DISTINCT keyword in first query. Creating a transaction by calling context. Hot You can either have EF enforce your SourceKey attribute using Table per Hierarchy Inheritance - and then you're mapping will break, or you can enforce the SourceKey in your business logic and only have EF manage the main Address class. EF Core makes it very easy to query out entity instances, and then use those instances in code. Relate Multiple Tables to Single General Purpose Table in Entity Framework Code First. [NotMapped] public class Employee { public int ID { get; set; } public String name { get; set; } } You can use this model for general purpose and table wont be created for this in database. 0 Linking multiple properties to the same table in Entity Framework. Modified 8 years, 3 months ago. The below techniques are described in terms of tables, but the same result can be achieved when mapping to views as well. Group Lambda multiple table. I have 2 tables with the following structure: User. Messages let Total = _db. 1 Entity Framework foreign key to multiple tables/entities. I have two . columnId, wo. Entity Framework Selecting columns from multiple tables (for ThenInclude)? Hot Network Questions First instance of the use of immersion in a breathable liquid for high g-force flight? In this case, you do not need to run an explicit transaction, because there is one already created by Entity Framework. Viewed 12k times 4 . Convert A Union Query To LINQ To Entity Query. " How am I supposed to select values from multiple tables into one object in Entity Framework? Thanks for any help! OrderID is an identity field generated by the database that I will need for inserting data into OrderItems table. Child1 and Child2 are mapped to 2 distinct tables table-child1 and table-child2. ProductID OR RR. StudentName = "Student 01"; //Create course objects Cours mathCourse = new Cours(); mathCourse. edmx file). var infoQuery = (from cust in db. ToTable("FeedListFeeds")). Hot Network Questions Why are there no no-attribution licenses other than "public domain"? I'm trying to have multiple tables with the same schema, within the same database, using Entity Framework. I need to do a query with multiple joins which include a join-table that was generated from a many-to-many relation. Your Answer Reminder: Answers generated by artificial OrderID is an identity field generated by the database that I will need for inserting data into OrderItems table. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can answer? Share a link It works as expected. If this doesnt work, a Union() certainly would work . Sign up Login. Project only properties you need. If you want to return this variable, you have to create a type for it. ServiceId SName 1 S1 In EF, joining tables is done through the use of Navigation Properties. net mvc5 using Entity Framework. However, querying entity instances can frequently pull back more data than necessary from your database. Edit The tables to which you are mapping share a common key. 5. Entity Framework Joining 3 Tables Together. But, now i have to detect which row belongs to which database/table, as i need to modify that particular record. Ask Question Asked 8 years, 3 months ago. Id ApplicationName ServiceId ProductID 1 Myapp 1 1 2) Table_Service. Entity framework - one to many - select from both table. Join list with table in linq. 0 SQL Server select queries union all and limit. 1. In addition I need to restricts I am working on an ASP. Solve real The result is that EF creates a separate table for it with the name FeedListFeeds1 because FeedListFeeds is reserved as table name in your many-to-many mapping (. branchId == 6 should either have a conditional such as (m == null ? 0 : m. columnType, tIn. For example, m above can be null so in the where clause the predicate m. 3. Basically, EF does it for you. You may instead change your pattern for exposing some interface allowing you to specify your includes from the caller without letting it When you’ve created tables that are related, you’ll often need to get data from both tables at once, or filter records from one table based on values in another table. UserId | Age ----- 1 15 2 36 3 25 DictAges. kqgwt ympa obd tns afimrmmks ebowp dratp nxyfuw vbh jfgrmpq