Can you use a merge table? 
CREATE TABLE merge_table (table definition) TYPE=MERGE UNION=(table1,t
+able2)
 
SELECT tok, COUNT(tok) FROM merge_table GROUP BY tok

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In reply to Re: OT: MySQL combine 2 tables data when Perl 'fails' by ChrisR
in thread OT: MySQL combine 2 tables data when Perl 'fails' by tachyon

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