在SQL中订购NVARCHAR字段

Question

I am using the below query to order a field in SQL

Select Distinct x From t  where c=1 order by x asc

X is an nvarchar column but currently the column have the below values

Is there anyway to order the values to be like this:

No Prize,1,2,3,4,5,6,7,8,9,10

Answer 1

In sql server 2012+ you could use try_cast , but you will have to change the distinct to a group by :

SELECT x
FROM t
WHERE c=1
GROUP BY x
ORDER BY Try_Cast(x as int) 

For older versions you can use union:

SELECT x
FROM
(
    SELECT x, CAST(x as int) as sort
    FROM t
    WHERE c = 1
    AND ISNUMERIC(x) = 1

    UNION 

    SELECT x, NULL
    FROM t
    WHERE c = 1
    AND ISNUMERIC(x) = 0
) as distinctX
ORDER BY sort