SQL select the longest char

Question

i have the table customer with column Name varchar(20), adresse varchar(50), tel varchar(10), etc.

how can i select the longest adresse ?

SELECT FROM customer 
WHERE adresse ?

Answer 1

SELECT address FROM customer WHERE length(address) = (SELECT max(length(address)) FROM customer)

Answer 2

select top (1) * from customer order by len(adresse) desc;

Answer 3

try this:

select max(len(adresse)) from customer 

Answer 4

You can do it with a subquery:

select * from customer where len (adresse) = (
    select max (len (adresse)) from customer)

The inner query figures out the maximum length over all the adresse columns, and the outer query gives you all the rows that have that length. And it may be more than one.