1. SQL:
查出产品对应的销售数量,会用到2个表之间的连接:
select Products.ProductName, Sales.SalesAmount from Product left outter join Sales
where Productes.ProductId=Sales.ProductId order by Sales.SalesAmount desc
2. JS:
写一个函数对数组元素进行输入,中间加上空格:
for (var i=0; i<cars.length;i++)
{
document.write(cars[i]+"<br>");
}
3. JS:
用prototype对已有对象方法进行扩展:
String.prototype.Hello=function () {
return this.Appned
};
4. JS:
考察JS中||的特殊应用:
String.prototype.repeat = String.prototype.repeat || function(times) {/* code here */};