发布时间：2015-10-21 15:55:59
在一个终端执行命令：nc -lk 9999当终端输入字符串时候，另一端看不到打印的数据。执行命令：./bin/run-example streaming.NetworkWordCount localhost 999915/10/21 15:06:42 INFO scheduler.JobScheduler: Added jobs for time 1445411202000 ms15/10/21 15:06:43 INFO storage.MemoryStore: ensureFreeSpace(14) call.........【阅读全文】
发布时间：2015-06-20 19:37:25
15. View the Exhibit and examine the data in the CUSTOMERS table. Evaluate the following query: SQL> SELECT cust_name AS "NAME", cust_credit_limit/2 AS MIDPOINT,MIDPOINT+100 AS "MAX LOWER LIMIT" FROM customers; The above query produc.........【阅读全文】
发布时间：2015-06-20 14:29:45
14. Using the CUSTOMERS table, you need to generate a report that shows 50% of each credit amount in each income level. The report should NOT show any repeated credit amounts in each income .........【阅读全文】
发布时间：2015-05-28 11:14:25
/etc/init.d 下的几个档案1. boot.local –> 这个开机启动档案会在 rc5.d 前就有动作2. halt.local –> 这个关机启动档案会在最后有动作3. before.local –> 这个档案比较用不到所以不需多做解释4. after.local –> 这个档案会在 rc5.d 之后有动作 , 就是最重要的开机启动档 ， 没有的话 新建一个 上面.........【阅读全文】
发布时间：2015-03-20 01:57:06
13. View the Exhibit and examine the structure of the PRODUCTS table. You need to generate a report in the following format: CATEGORIES 5MP Digital Photo Camera's category is Photo Y Box's category is Electronics Envoy Ambassador's category is Hardware Which two queries would give the required.........【阅读全文】
