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SQL triggeris unikaliem ierakstiem.


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Labdien.

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MySql triggeris , kas dara sekojošo...

 

Tiklīdz tabula A tiek ievietots ieraksts no šā ieraksta lauks1, lauks2, lauks3 tiek ievietots tabula B, bet tikai tad ja tabula B jau šādu ierakstu pēc parametiem, lauks1, lauks2, lauk3 jau nesatur..

 

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