Transact-SQL error message Msg 4511 Level 16 - Create View or Function failed because no column name was specified - means that in your view exist an concatenated column composed of multiple columns and has not declared an alias.

The error message itself is quite clear: it is telling you that you are trying to create a view or function without specifying column names for one or more of the output columns. SQL Server requires that every column in a view or function must have a name assigned to it.

Msg 4511 Level 16 Example

Here's an example of what this error might look like in SQL code:

Invalid create view:

USE model;
GO
CREATE VIEW studentsList AS
SELECT id, CONCAT(first_name,' ',last_name), gender
FROM students
GO

Correct create view:

USE model;
GO
CREATE VIEW studentsList AS
SELECT id, CONCAT(first_name,' ',last_name) full_name, gender
FROM students
GO

In summary, SQL Server error 4511 indicates that you need to provide column names for the output columns when creating a view or function. Properly naming columns is essential for data retrieval and maintainability, and addressing this error ensures your SQL code is correct and functional.

Other error messages:

• Cannot drop the table
• Is not a constraint
• Cannot define PRIMARY KEY constraint on nullable column in table
• Column is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause
• String or binary data would be truncated
• The database name component of the object qualifier must be the name of the current database
• No item by the name of '%' could be found in the current database.