psini, thank you very much for your reply.. this is actually an example, so there are probably more fields in table2.:)

In fact, even with just two fields, using a separate table sometimes save me lot of disk spaces and time, i.e. if 'property' varchar(20) becomes varchar(250) or text. In fact, I just refactored one of my big table from 4GB to 2.2GB yesterday by such process(normalization). the new table took 4 hours instead of 2 days to build a huge Unique key constraint. :-)

In reply to Re^2: SQL question: Insertion with FK constraint by lihao
in thread SQL question: Insertion with FK constraint by lihao

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