mag数据库表与表的三种⽅式prerve表和表之间,⼀般就是三种关系:⼀对⼀,⼀对多,多对多1、⼀对⼀:数据库表中的数据结构,我们⽤⼈与车⼀ ⼀对应的⽅式来描述⼀对⼀的数据表结构,type是区分这条数据是⼈还是车,master对应是的主⼈(车的主⼈是哪个id,car对应的是那辆车的id)SQL代码中,我们先创建这⼀张表: 注--if not exists的意思是&nb
Look 【2 】短语动词归纳1 . look after 照看,照料,负责处理.I can look after mylf .She's been looking after the luggage .brazzaville2 . look at 看 ( 问题 ) ,对待.sad的反义词That's the way I look at it .He looks at a ques