这是我已成功加载到表测试并成功获取数据的文件中的数据:
Select * from test;
Name ph category
Name1 ph1 {"type":1000,"color":200,"shape":610}
Name2 ph2 {"type":2000,"color":200,"shape":150}
Name3 ph3 {"type":3000,"color":700,"shape":167}
但是当我执行这个查询时:
select category["type"] from test;
我得到空值;
请帮忙。谢谢赛