BigQuery：如何将年转换为十年？

Question

在这个伟大的article中，我找到了将年转换为十年的方法，但它对我来说太过冗长了！

有更好的方法吗？

  

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Answer 1

从年份“提取”十年 - REGEXP_REPLACE功能可以在下面的示例中使用

  

#standardSQL
WITH data AS (
  SELECT '1921' AS YEAR UNION ALL
  SELECT '1932' UNION ALL
  SELECT '1943' UNION ALL
  SELECT '1954' UNION ALL
  SELECT '1985' UNION ALL
  SELECT '2006' UNION ALL
  SELECT '2017' UNION ALL
  SELECT '2018' 
)
SELECT
  YEAR,
  CASE 
    WHEN YEAR LIKE "192%" THEN "20S"
    WHEN YEAR LIKE "193%" THEN "30S"
    WHEN YEAR LIKE "194%" THEN "40S"
    WHEN YEAR LIKE "195%" THEN "50S"
    WHEN YEAR LIKE "196%" THEN "60S"
    WHEN YEAR LIKE "197%" THEN "70S"
    WHEN YEAR LIKE "198%" THEN "80S"
    WHEN YEAR LIKE "199%" THEN "90S"
    WHEN YEAR LIKE "200%" THEN "2000S"
    WHEN YEAR LIKE "201%" THEN "2010S"
  END AS DECADES
FROM data
-- ORDER BY YEAR