Question

What is the difference between := and Into in the select query ?

eg:

SELECT  filesinfo.IsFolder, 
        filesinfo.ReferenceID 
INTO    @IsFolder, @ReferenceID 
FROM filesinfo 
WHERE filesinfo.FileID = @ChildID; 

and:

SELECT  @IsFolder := filesinfo.IsFolder,
        @ReferenceID := filesinfo.ReferenceID 
FROM filesinfo 
WHERE filesinfo.FileID = @ChildID; 

Answer 1

You can use the INTO clause to write the output to a file as well as store in a variable.

While, the assignment operator := only assigns a scalar value to a variable.