Em 13/12/2012 18:22, John R Pierce escreveu:
> On 12/13/2012 5:32 AM, seiliki@so-net.net.tw wrote:
>> I am trying to implement a mechanism that prohibits the last row of a
>> data set from being deleted.
>>
>> CREATE TABLE t1 (c1 INTEGER,c2 INTEGER, PRIMARY KEY (c1,c2));
>>
>> INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(2,1),(2,2),(2,3);
>
> Which row is the last row? relations are sets, not ordered lists.
>
>
Last row is not the row that remains, no matter the order?
Edson
