SQL SELECT INTO 语句
SELECT INTO 语句将数据从一个表复制到一个新表中。
SELECT INTO 语法
将所有列复制到新表中:
SELECT *
INTO newtable [IN externaldb]
FROM oldtable
WHERE condition;只复制一些列到新表中:
SELECT column1, column2, colu…
看看下面的代码
这是错误的
class A {
public:int x 10;
};
class B :public A {using A::x;int x 100;
};看看函数
class A {
public:void fun(){cout << "uuuu" << endl;}
};
class B :public A {
public:using A::fun;void fun(){cout << …