kettle 增量同步

http://www.cnblogs.com/inuyasha1027/p/Kettle_update_timestamp.html

https://ask.hellobi.com/blog/yuguiyang1990/7023

http://blog.csdn.net/zhangweicsdn/article/details/51008025

http://blog.sina.com.cn/s/blog_54829a240102vovy.html

http://blog.csdn.net/xiaohai798/article/details/45364561