如何使用SQL將重復的數據插入BigQuery表

Question

我有2個具有以下架構的表：

1. 具有(CLIENT_ID, CLIENT_NAME) CLIENTS
2. 與ADDRESSES (ADDRESS_ID, CLIENT_ID, STREET, ZIP_CODE)

假設1個地址屬於1個客戶端，並且1個客戶端可能有多個地址。

我想在BigQuery中使用CLIENT_ID, CLIENT_NAME, ADDRESSES （記錄，重復）創建一個D_CLIENTS表。 如何使用SQL的Insert into腳本將數據插入該表？

Answer 1

我將編寫創建該表的查詢（否則我將無法插入），但是將其修改為隨后插入應該很簡單：

CREATE TABLE `deleting.addresses`
AS

WITH clients AS (
  SELECT 1 AS id, 'Dean Finn' AS name
), addresses AS (
  SELECT * FROM UNNEST([(STRUCT(8 AS id, 1 AS client_id, "Spear" AS street, "94105" AS zip))])
)

SELECT a.id client_id, ANY_VALUE(name) name, ARRAY_AGG(STRUCT(street, zip)) addresses
FROM clients a JOIN addresses b ON a.id=b.client_id
GROUP BY 1