If a field contains null then entire concatenate result is null

Entity Framework 6 GUID as primary key: Cannot insert the value NULL into column 'Id', table 'FileStore'; column does not allow nulls

You should also include the following properties in your Id column:...[Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } ...When moving, you should modify your...CreateTable... to include...defaultValueSQL... to your column, such as:...Id = c.Guid(nullable: false, identity: true, defaultValueSql: "newsequential...

How can I determine which fields are specified as NOT NULL within the database?

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Use Null Conditional Operator on property of Null Object

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Entity Framework Core (EF 7) many-to-many results always null

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Does EF Core allow a unique column to contain multiple nulls?

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Entity Framework Core assigning null value to non-null primary key

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How do I change a null string to non-null int in Entity Framework 2 Core?

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Image File sets to null after updating only other fields

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Npgsql, error during saving a DateTime value (null value in column "CreatedAt" violates not-null constraint)

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I get error: Value cannot be null, Why is my ICollection always null?

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