T-SQL and the WHERE LIKE %Parameter% clause

Question

I was trying to write a statement which uses the WHERE LIKE '%text%' clause, but I am not receiving results when I try to use a parameter for the text. For example, this works:

SELECT Employee WHERE LastName LIKE '%ning%' 

This would return users Flenning, Manning, Ningle, etc. But this statement would not:

DECLARE @LastName varchar(max) SET @LastName = 'ning' SELECT Employee WHERE LastName LIKE '%@LastName%' 

No results found. Any suggestions? Thanks in advance.

Answer 1

It should be:

... WHERE LastName LIKE '%' + @LastName + '%'; 

Instead of:

... WHERE LastName LIKE '%@LastName%'