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Which is the default value in Stack Overflow?
11 Answers. the default keyword, which will return null for reference types and zero for numeric value types. For structs, it will return each member of the struct initialized to zero or null depending on whether they are value or reference types. For nullable value types, default returns a System.Nullable, which is initialized like any struct.
Which is the last value in Transact-SQL?
Returns the last value in an ordered set of values. To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. Is the value to be returned. scalar_expression can be a column, subquery, or other expression that results in a single value.
How to return default value other than null?
Instead of YourCollection.FirstOrDefault (), you could use YourCollection.DefaultIfEmpty (YourDefault).First () for example. I just had a similar situation and was looking for a solution that allows me to return an alternative default value without taking care of it at the caller side every time I need it.
How to set a default value in EF6?
EF6 right? Just open your model, right click on the column you want to set a default for, choose properties, and you will see a “DefaultValue” field. Just fill that out and save. It will set up the code for you. Your mileage may vary on code first though, I haven’t worked with that.
Which is the default value in firstordefault?
In case of reference types it’ll return ” Null ” etc. Generally, FirstOrDefault returns item which you’ve requested of default value for collections type. In case of references it’s null, in case of int – 0 etc. Thanks for contributing an answer to Stack Overflow!
Is there a default value other than NULL in LINQ?
As I understand it, in Linq the method FirstOrDefault () can return a Default value of something other than null. No. Or rather, it always returns the default value for the element type… which is either a null reference, the null value of a nullable value type, or the natural “all zeroes” value for a non-nullable value type.
When to use DEFAULT value and NOT NULL in SQL?
My SQL teacher said that if you specify both a DEFAULT value and NOT NULL or NULL, DEFAULT should always be expressed before NOT NULL or NULL. I would say not. If the column does accept null values, then there’s nothing to stop you inserting a null value into the field. As far as I’m aware, the default value only applies on creation of a new row.