但是只能通过递归模板或者扩展函数来完成其他两种常见的操作：求最大值和最小值。
But, you can only accomplish two other popular operations on a set of Numbers, finding the minimum and maximum, by a recursive template or extension function.
第三类问题是求函数的最大值和最小值问题。
The third kind of problem is the demand function of the maximum and minimum problems.
还有 求和、 求 平均值、计数、 求最大值、 求最小值等库函数。
It provides Data Definition Language (DDL) , Data Manipulation Language (DML) , as well built-in functions, such as:Sum, Average, Count, Maximum and Minimum.
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