SQL BigQuery 行到列

Question

这是我的数据样本

我正在尝试获取：

谢谢

Answer 1

您可以使用 unnest() 和数组在 BigQuery 中逆透视：

select t.holiday, t.segment, el.dte, el.booking
from t cross join
     unnest(array[struct('1/1/2020' as dte, "1/1/2020" as booking),
                  struct('1/2/2020' as dte, "1/2/2020" as booking),
                  . . .
                 ]
            ) el;