Apr 14, 2016 · I am creating an application to transfer data from one database into another for a new application and I am running into an issue access some of ...
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Is it possible entity framework will support tables without primary key?
If there's no primary key, Entity Framework can't use the table. EF MUST have a way to uniquely identify every record in the table, and that means having primary keys. Really, you don't even want to work with "tables" that don't have keys without some ORM.
What if a table doesn't have a primary key?
If you do not define a PRIMARY KEY for your table, MySQL locates the first UNIQUE index where all the key columns are NOT NULL and InnoDB uses it as the clustered index. So, it's possible that the table will still have a clustered index based on an existing secondary index.
Can a database table exist without a primary key?
The short answer is YES. A database table can exist without a primary key. But without having a primary key on a table you are leaving the door open for potential data management/inconsistency headaches. I would not create a table without primary key unless you have a really strong reason not to create one.
How to create an entity for a table having no primary key?
When you define an entity object, it must have a primary key or use a RowID attribute (based on the table's ROWID). To do so, you must create a new attribute while you are defining your entity object in the Entity Object Wizard.
Oct 22, 2010 · Some tables do not have primary keys defined so that when I create a new Entity Data Model, I get the following message: The table/view ...
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Can we have table without primary key in entity framework?
stackoverflow.com › questions › can-we-...
Mar 13, 2013 · I have a program that is not made by another company and that I thus cannot alter, but it has a table without primary key, it contains order ...
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Jul 9, 2019 · Short answer, you don't. Entity Framework requires a key. Good news is you can effectively spoof a key if your table doesn't have one.
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Feb 11, 2018 · Based on my research in last few days, EF Core's DBSet only works with table with Identity or Primary key. The whole EF Core is based on ...
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Apr 12, 2018 · I'm using Entity Framework to map some tables, but I can't do this unless I declare some column as the primary key. The problem here is that my ...
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I am creating an application to transfer data from one database into another for a new application and I am running into an issue access some of the data in ...
Apr 3, 2018 · I have thought one solution like to add an autoincrement identity column as PK. Please suggest a good and proper way to do this? [Key] public ...
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Jun 22, 2015 · Our customer has given the access to views in which there is no primary key is defined. I know Entity Framework needs a primary key for table to ...
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Jun 25, 2019 · I am attempting to compare one table, "item" (has a primary) with "Pics" [No key] in order to get results from "item" that have pictures.
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