google-bigquery - BigQuery 其中日期小于或等于 3 天减去当前日期

Question

我正在尝试创建一个查询以仅返回日期为当前日期减 3 天的数据。我试过了:
date <= DATE_ADD(CURRENT_DATE(), -3, 'DAY')
但这会返回 Error: Expected INTERVAL expression

Answer 1

请参阅以下示例中的 WHERE 子句

#standardSQL
WITH yourTable AS (
  SELECT i, date
  FROM UNNEST(GENERATE_DATE_ARRAY('2017-04-15', '2017-04-28')) AS date WITH OFFSET AS i
)
SELECT *
FROM yourTable
WHERE date <= DATE_SUB(CURRENT_DATE(), INTERVAL 3 DAY)
-- ORDER BY date

顺便说一句，如果您仍然使用旧版 SQL - 请参见下面的示例

#legacySQL
SELECT *
FROM -- yourTable  
  (SELECT 1 AS id, DATE('2017-04-20') AS date),
  (SELECT 2 AS id, DATE('2017-04-21') AS date),
  (SELECT 3 AS id, DATE('2017-04-22') AS date),
  (SELECT 4 AS id, DATE('2017-04-23') AS date),
  (SELECT 5 AS id, DATE('2017-04-24') AS date),
  (SELECT 6 AS id, DATE('2017-04-25') AS date)
WHERE TIMESTAMP(date) <= DATE_ADD(TIMESTAMP(CURRENT_DATE()), -3, 'DAY')
-- ORDER BY date