Hi guys

I have a client who wants to make changes to 3500 products and I wondered if I could do this quickly using sql queries:

1. Reduce price of every product by 17.5%
2. set every product to 'taxable goods' (currently all product prices are -non-)

Can anybody assist me with the correct sql queries to carry out these changes globally (3500 product would take a long time one by one).

Thank you very much in advance

Rob