íÎÑÍÓ. ïÐÉÓËÁ. îÅÔ ÔÁË:
>
> select 'Ok' from  rdb$database
>   where 0 not in  (null, 0)
>
> = ÐÕÓÔÏÊ ÎÁÂÏÒ.
>

...Á ×ÏÔ ÔÁË:

 select 'Ok' from  rdb$database
   where 0 not in  (null, 1)

 = ÐÕÓÔÏÊ ÎÁÂÏÒ.



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