Problem mit UNION Select

[mkinzler]

SQL-Code:

select 
    distinct p.persnr,
    first 1 d.datum as datum1,
    first 1 skip 1 d.datum as datum2,
    first 1 skip 2 d.datum as datum 3,
    ...
from
    tabelle2 p
        left join tabelle2 d on d.persnr = p.persnr;