摘要：
class Program { struct shangpin //定义个结构体 { public string mingcheng; public int jiage; public int shuliang; } public double chaoshi(double zongjia) //... 阅读全文
摘要：
goupdate xueshengxinxi set name='你好' where code=1--修改第一行name的名字，改成“你好”update xueshengxinxi set [weight]=50 where code=9godelete from xueshengxinxi --删... 阅读全文