advantaje using Expressiones

[bertha amalia serrato de la cruz]

hello
i have a problem

when i want to use an expreesiones like a 
EXPRESSION ('[PERIODO]' eq '^Paleogeno$') Don't Work

EXPRESSION ('[PERIODO]' eq  'Paleogeno') work but no
correctly because give me Paleogeno and all the word
ending wtih "geno"

EXPRESSION ('^Paleogeno$')   don't work

i don't know how can i resolve this problem, i'm
getting worried about it.


Which are the advantages using expressions????



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*--*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
    Lic. Ciencias Computacionales Bertha A. Serrato
    bserrato at cicese.mx
    CICESE,División de Ciencias de la Tierra.
    Ensenada, B.C.
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-

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