reading file

aseee has asked for the wisdom of the Perl Monks concerning the following question:

Hi, I have a file in which

ID   AaaI
ET   R2
AC   RB00001;
OS   Acetobacter aceti ss aceti
PT   XmaIII
RS   CGGCCG, 1;
CR   .
RN   [1]
RA   Tagami H., Tayama K., Tohyama T., Fukaya M., Okumura H., Kawamura
+ Y., 
RA   Horinouchi S., Beppu T.;
RL   FEMS Microbiol. Lett. 56:161-166(1988).
//
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patterns repeats itself hundred of times. What I want is to store the AaaI in Id column, R2 in ET column, RB00001 in AC, Acetobacter aceti ss aceti in OS column, XmaIII in PT column and CGGCCG in RS column of an database table.I know it it can be done in regular expression but I am unable to grep regular expression. Please also give some basic and advance links to tutorials of regular expression.

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