Em 13/12/2012 18:22, John R Pierce escreveu:
On 12/13/2012 5:32 AM, seiliki@xxxxxxxxxxxxx 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
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