1.商品价格统一上调50

UPDATE `nc_goods` SET `goods_price` = `goods_price` +50

2.商品价格个别上调50

UPDATE `nc_goods` SET `goods_price` = `goods_price` +50 where goods_id!=1004  (除了1004这个商品不调价格)

UPDATE `nc_goods` SET `goods_price` = `goods_price` +50 where goods_id=1004

个别运算也是这样写,自己领会