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Re: How to keep the last row of a data set?

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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.


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