Question

Okay, say i have a table with the field “code”. The query select code from mytable group by code returns:

code
EM010
EM100
EM101
EM105
EM106
...

I need to add a column (with a join or something) that will contain the next highest code. The above would turn to:

code    code2
EM010   null (or blank or wtvr)
EM100   EM010
EM101   EM100
EM105   EM101
EM106   EM105
...     ...

I’d provide what I’ve tried but it’s messy and I keep realizing I’m going about it the wrong way.

btw, i’m working in vfp so it’s technically tsql but i should be able to convert anything that’s different, so i don’t mind if i get answers that haven’t been tested in tsql.

Answer 1

Try

DECLARE @T TABLE (Code VARCHAR(5))
INSERT @T VALUES ('EM010'), ('EM100'), ('EM101'), ('EM105'), ('EM106')

SELECT  T1.Code,
        (   SELECT  MAX(Code)
            FROM    @T t2
            WHERE   t1.Code > t2.Code
        ) AS Code2
FROM    @T t1