BigQuery：如何將年份轉換爲十年？

Question

在這個偉大的article中，我找到了將年份轉換爲十年的方法，但它看起來對我來說太冗長了！

有沒有更好的方法來做到這一點？

#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 

Answer 1

從年 「提取」 十年 - REGEXP_REPLACE功能可以作爲下面的例子

#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 '2028' 
) 
SELECT 
    YEAR, 
    REGEXP_REPLACE(YEAR, r'(?:19)(\d)\d|(20\d)\d', '\\1\\20s') AS DECADES 
FROM data 
-- ORDER BY YEAR