Yes, you can do this. But you'll definitely need PL/SQL and the UTL_SMTP package. Hopefully, the following sample program will give you an idea of what you need to do:
DECLARE col_date DATE; mailhost VARCHAR2(30):='mailhost.mydomain.com'; mail_conn utl_smtp.connection; BEGIN SELECT date_column INTO col_date FROM tableX; IF (col_date < TO_DATE('01/01/02','MM/DD/YY')) THEN mail_conn := utl_smtp.open_connection(mailhost, 25); utl_smtp.helo(mail_conn, mailhost); utl_smtp.mail(mail_conn, sender); utl_smtp.rcpt(mail_conn, recipient); utl_smtp.data(mail_conn, message); utl_smtp.quit(mail_conn); END IF; END;You'll have to supply values sender, recipient and message, which I've ommitted. The Oracle docs on the UTL_SMTP package give you much more detail!
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This was first published in April 2002