sql - 将 JSON 值列表分解为 SNOWFLAKE 数据库表中的行

Question

我按照下面的屏幕截图有一个表格，它基本上是一个 JSON 并被解析以获得下面的输出，现在我想要列 City 和 orders 中的值列表被拆分成行。
有人可以帮我吗

所需的输出如下

Answer 1

这是一种方法。首先去掉 ["和 ]"因为 city 列中的双引号不包含单个数组元素而是包含所有元素，然后将字符串标记化并使用 strtok_to_array 将其作为真实数组返回，然后将数组元素展平以分隔行并将行(城市)横向连接回记录的其余部分。

with data as
(select 'A' as name, 'M' as gender, '["completed"]' as orders, '["Cochi,Hyderabad"]' as city
union all
 select 'B' as name, 'M' as gender, '["completed"]' as orders, '["Cochi,Hyderabad,Delhi"]' as city
union all
 select 'C' as name, 'F' as gender, '["cancelled"]' as orders, '["Mumbai,Pune"]' as city
union all
 select 'D' as name, 'M' as gender, '["pending"]' as orders, '["cochi"]' as city
)
, data2 as 
( select d.name
 , d.gender
 , replace(replace(d.orders,'["',''),'"]','') as orders
 , strtok_to_array(replace(replace(city,'["',''),'"]',''),',')  as city
 from data d
)
 select d2.name
 , d2.gender
 , d2.orders
 , replace(c.value,'"','') as city
 from data2 d2
  , lateral flatten(input => d2.city) c;