select
products_to_categories.products_id, categories_id, products_price, products_image, products_model, products_name, products_description

from
products_to_categories, products_description, products

where
　　　 products.products_id = products_to_categories.products_id
AND products_description.products_id = products_to_categories.products_id
AND categories_id = " 1 "//这里是商品分类id为1的分类.
AND products_description.language_id = $languages_id
AND products_price != 0
AND products_status = '1'
order by products_name


AND categories_id = " 1 "//这里是商品分类id为1的分类.
如果（条件）要查询categories_id =1 和30 45 9 8等值的sql语句怎么写