Re: Table transform query - Mailing list pgsql-sql

On 9/18/07, Philippe Lang <philippe.lang@attiksystem.ch> wrote:
> ... into this:
>
>
> serial  dateL  dateR
> --------------------
> 1       1      2
> 1       4
> 2       1      2
> 3       1      3
> 4       2      3
> 5       3

SELECT   t1.serial, t1.DATE AS datel, t2.DATE AS dater   FROM t t1 LEFT JOIN t t2 ON(    t1.serial = t2.serial
                    AND t1.DATE < t2.DATE)  WHERE t1.delivery = 'L'    AND (   t2.delivery = 'R'         OR t2.delivery
ISNULL)
 
ORDER BY t1.serial