UNNEST 和加入 | 大查詢

Question

我可以使用以下代碼在 Big Query 中取消嵌套一個表：

SELECT * EXCEPT(instance, line_items) FROM (
SELECT *, ROW_NUMBER() OVER(PARTITION BY id) AS instance
  FROM `shopify.orders`
), UNNEST(line_items) as item

WHERE 實例 = 1

此外，我可以使用以下代碼將此表（未嵌套）與另一個表連接起來：

SELECT * FROM (
  SELECT *, ROW_NUMBER() OVER(PARTITION BY id) AS instance
  FROM `shopify.orders`
  JOIN `google_analytics.GA`
  ON name = TransactionID

)

WHERE instance = 1

但是，我不確定如何加入這兩個表，同時仍然從我的第一個查詢中取消嵌套值。 知道如何將 UNNESTED 表與另一個表連接起來嗎？

Answer 1

join不行嗎？

SELECT * EXCEPT(instance, line_items)
FROM (SELECT *, ROW_NUMBER() OVER(PARTITION BY id) AS instance
      FROM `shopify.orders`
     ) o CROSS JOIN
     UNNEST(o.line_items) as item JOIN
     `google_analytics.GA` ga
      ON name = TransactionID