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创建数据库表,插入,修改,删除,查询
create database product (code char(5) , namevarchr(20), manu_date date,exp_date date,pricefloat(10,3),primary key(
create database product (code char(5) , namevarchr(20), manu_date date,exp_date date,pricefloat(10,3),primary key(