如何将数据转换成给定的格式？

Question

task_id     json_data
task1       [ [160, "4d3a339c-68ba"], [15, "554fc01c-b5d2"] ]

I have to change the above image into the below format:

task_id     area        iiid    
task1       160         "4d3a339c-68ba"
task1        15         "554fc01c-b5d2"

Answer 1

You can turn the json content to an array of arrays, then unnest it, and then bring the first and second element of each sub-array:

select t.task_id, x.ar[0] area, x.ar[1] iiid
from mytable t
cross join unnest(cast(t.json_data as array(array(varchar)))) as x(ar)