在MySQL中,使用CREATE DATABASE语句创建数据库db_test后,该数据库并不会自动成为当前数据库。如果想让它成为当前数据库,需要使用MySQL提供的USE语句来实现,USE语句可以实现选择一个数据库,使其成为当前数据库。只有使用USE语句指定某个数据库为当前数据后,对该数据库及其存储的数据对象执行操作。语句为: A. USE db_test;
【简答题】Old John went to see a doctor. The doctor examined and said, “ Medicine can’t help you. You must have a good rest. Go to a quiet place for a month, go to bed early, drink some milk, walk a lot and smo...
【简答题】阅读理解。 The Doctor’s Note When you go to see a doctor,he will write you a note to take to the chemist for some medicine. Chemists are usually good at reading doctors' notes. But sometimes doctors write ...