正则表达式将键值拆分为 Bigquery 中的列答案

【问题标题】：Regexp split key values into columns in Bigquery正则表达式将键值拆分为 Bigquery 中的列
【发布时间】：2021-05-12 13:38:31
【问题描述】：

我的列数据看起来像

"dayparts": [{"day": "Saturday", "hours": [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13] }, {"day": "Sunday", "hours": [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]}, {"day" : "星期四", "小时": [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]}]

我想要这样的结果

【问题讨论】：

标签： regex dictionary google-bigquery

【解决方案1】：

你可以试试：

WITH sample AS (
SELECT "1" AS id, "{\"dayparts\":[{\"day\":\"Saturday\",\"hours\":[0,1,2,3,4,5,6,7,8,9,10,11,12,13]},{\"day\":\"Sunday\",\"hours\":[0,1,2,3,4,5,6,7,8,9,10,11,12,13]},{\"day\":\"Thursday\",\"hours\":[0,1,2,3,4,5,6,7,8,9,10,11,12,13]}]}" AS msg
)
SELECT id,
    JSON_VALUE(dparts, '$.day') AS day,
    JSON_QUERY(dparts, '$.hours') AS hours
FROM (
SELECT id,
    JSON_EXTRACT_ARRAY(JSON_QUERY(msg, '$.dayparts')) AS dayparts
FROM sample) t, UNNEST(t.dayparts) dparts

（我添加了封闭的“{”和“}”以便能够执行 JSON 操作，如果它们不存在，我猜只是将它们连接起来）（如果您希望结果表中有一个实际数组，也可以在“JSON_QUERY(dparts, '$.hours')”周围添加“JSON_EXTRACT_ARRAY”）

【讨论】：