內容如下：
1.The history of the computerized database
2.SQL Data Statements--those used to create, manipulate, and retrieve data stored in your database example statements include select, update, insert, and delete
3.SQL Schema Statements--those used to create database objects, such as tables, indexes, and constraints
4.How data sets can interact with Queries
5.The importance of subQueries
6.Data conversion and manipulation via SQL s built-in functions
7.How conditional logic can be used in Data Statements
This program uses the database created by MakeAPIDB. It opens a connection
* to a database using the same property file used by MakeAPIDB. Then it
* Queries that database in several interesting ways to obtain useful
* information about Java APIs. It can be used to look up the fully-qualified
* name of a member, class, or package, or it can be used to list the members
* of a class or package.
MemoryMonitor demonstrates the use of the java.lang.management API
in observing the memory usage of all memory pools consumed by
the application.
This simple demo program Queries the memory usage of each memory pool
and plots the memory usage history graph.
To run the MemoryMonitor demo
java -jar <JDK_HOME>/demo/management/MemoryMonitor.jar
北京大學ACM比賽題目
Consider an infinite full binary search tree (see the figure below), the numbers in the nodes are 1, 2, 3, .... In a subtree whose root node is X, we can get the minimum number in this subtree by repeating going down the left node until the last level, and we can also find the maximum number by going down the right node. Now you are given some Queries as "What are the minimum and maximum numbers in the subtree whose root node is X?" Please try to find answers for there Queries.
Let the following relational tables be given: R = (A, B, C) and S = (D, E, F) where A, B, C, D, E, and F are the attributes (columns). Write the SQL statements that will express each of the Queries given below:
The iputils package contains ping, a basic networking tool. The ping command sends a series of ICMP protocol ECHO_REQUEST packets to as pecified network host and can tell you if that machine is alive and receiving network traffic.ipv6calc is a small utility which formats and calculates IPv6 addresses in different ways. It extends the existing address detection on IPv6 initscript setup or make life easier in adding reverse IPv6 zones to DNSor using in DNS Queries like nslookup -q=ANY ipv6calc -r 3ffe:400:100:f101::1/48`
