Part III Intro

數據預處理

https://github.com/erlcssont29i/Hands-On-Data-Analysis-with-Hive-SQL/blob/main/part-iii-shu-ju-yu-chu-li-pian/7.-hao-yong-de-case-yu-when-ifhttps://github.com/erlcssont29i/Hands-On-Data-Analysis-with-Hive-SQL/blob/main/part-iii-shu-ju-yu-chu-li-pian/8.-yong-han-shu-gao-xiao-chu-li-shu-juhttps://github.com/erlcssont29i/Hands-On-Data-Analysis-with-Hive-SQL/blob/main/part-iii-shu-ju-yu-chu-li-pian/9.-fan-ren-de-que-shi-shu-ju-yu-ji-duan-zhi