V-ERG (疲惫地)垂下,低垂,垂落 If a person or a part of their body drops to a lower position, or if they drop a part of their body to a lowe

drop与delete的区别:初学sql语言,难免被drop和delete用法弄混,二者都有删除的意思。那它们又有什么区别呢?drop主要用于删除结构例如删除数据库:drop d