Amazon Redshift 將不再支援從修補程式 198 開始建立新的 Python UDFs。現有 Python UDF 將繼續正常運作至 2026 年 6 月 30 日。如需詳細資訊，請參閱[部落格文章](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/)。 本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。 # ORDER BY 的範例 從 CATEGORY 資料表傳回全部 11 列，並依第二個資料欄 CATGROUP 排序。若結果擁有相同的 CATGROUP 值，則依字元字串的長度排列 CATDESC 資料欄的值。然後，依 CATID 和 CATNAME 欄排序。 ``` select * from category order by 2, length(catdesc), 1, 3; catid | catgroup | catname | catdesc ------+----------+-----------+---------------------------------------- 10 | Concerts | Jazz | All jazz singers and bands 9 | Concerts | Pop | All rock and pop music concerts 11 | Concerts | Classical | All symphony, concerto, and choir conce 6 | Shows | Musicals | Musical theatre 7 | Shows | Plays | All non-musical theatre 8 | Shows | Opera | All opera and light opera 5 | Sports | MLS | Major League Soccer 1 | Sports | MLB | Major League Baseball 2 | Sports | NHL | National Hockey League 3 | Sports | NFL | National Football League 4 | Sports | NBA | National Basketball Association (11 rows) ``` 從 SALES 資料表傳回選取的欄，並依最高 QTYSOLD 值排序。將結果限制為前 10 個資料列： ``` select salesid, qtysold, pricepaid, commission, saletime from sales order by qtysold, pricepaid, commission, salesid, saletime desc limit 10; salesid | qtysold | pricepaid | commission | saletime --------+---------+-----------+------------+--------------------- 15401 | 8 | 272.00 | 40.80 | 2008-03-18 06:54:56 61683 | 8 | 296.00 | 44.40 | 2008-11-26 04:00:23 90528 | 8 | 328.00 | 49.20 | 2008-06-11 02:38:09 74549 | 8 | 336.00 | 50.40 | 2008-01-19 12:01:21 130232 | 8 | 352.00 | 52.80 | 2008-05-02 05:52:31 55243 | 8 | 384.00 | 57.60 | 2008-07-12 02:19:53 16004 | 8 | 440.00 | 66.00 | 2008-11-04 07:22:31 489 | 8 | 496.00 | 74.40 | 2008-08-03 05:48:55 4197 | 8 | 512.00 | 76.80 | 2008-03-23 11:35:33 16929 | 8 | 568.00 | 85.20 | 2008-12-19 02:59:33 (10 rows) ``` 使用 LIMIT 0 語法會傳回一份資料欄清單，但沒有資料列： ``` select * from venue limit 0; venueid | venuename | venuecity | venuestate | venueseats ---------+-----------+-----------+------------+------------ (0 rows) ```