hive函数 get_json_object

pandas和SQL数据分析实战

https://study.163.com/course/courseMain.htm?courseId=1006383008&share=2&shareId=400000000398149

转载

http://www.javashuo.com/article/p-fmulaque-bg.html

 

hive提供了json的解析函数：get_json_object

 

使用方法

对于jsonArray（json数组），如person表的xjson字段有数据：

[{"name":"王二狗","sex":"男","age":"25"},{"name":"李狗嗨","sex":"男","age":"47"}]

取出第一个json对象，那么hive sql为：

SELECT get_json_object(xjson,"$.[0]") FROM person;

 结果是：

{"name":"王二狗","sex":"男","age":"25"}

取出第一个json的age字段的值：

SELECT get_json_object(xjson,"$.[0].age") FROM person;

结果

25

 

总结

get_json_object(param1,"$.param2")

 

 python机器学习-sklearn挖掘乳腺癌细胞( 博主亲自录制)

网易云观看地址

https://study.163.com/course/introduction.htm?courseId=1005269003&utm_campaign=commission&utm_source=cp-400000000398149&utm_medium=share

扫二维码，关注博主主页，学习更多Python知识

https://m.study.163.com/user/1135726305.htm?utm_campaign=share&utm_medium=iphoneShare&utm_source=weixin&utm_u=1015941113