いくつかの簡単なクエリを実行して、さまざまな書式設定文字列が日付/時刻値の書式設定にどのように影響するかを確認するのは興味深いと思いました。
例1-不変の文化
DECLARE @date datetimeoffset, @culture char(2); SET @date = '2030-05-25 23:59:30.1234567 +07:00'; SET @culture = 'iv'; SELECT FORMAT(@date, 'd', @culture) AS 'd', FORMAT(@date, 'D', @culture) AS 'D', FORMAT(@date, 'f', @culture) AS 'f', FORMAT(@date, 'F', @culture) AS 'F', FORMAT(@date, 'g', @culture) AS 'g', FORMAT(@date, 'G', @culture) AS 'G', FORMAT(@date, 'm', @culture) AS 'm', FORMAT(@date, 'M', @culture) AS 'M', FORMAT(@date, 'o', @culture) AS 'o', FORMAT(@date, 'O', @culture) AS 'O', FORMAT(@date, 'r', @culture) AS 'r', FORMAT(@date, 'R', @culture) AS 'R', FORMAT(@date, 's', @culture) AS 's', FORMAT(@date, 't', @culture) AS 't', FORMAT(@date, 'T', @culture) AS 'T', FORMAT(@date, 'u', @culture) AS 'u', FORMAT(@date, 'U', @culture) AS 'U', FORMAT(@date, 'y', @culture) AS 'y', FORMAT(@date, 'Y', @culture) AS 'Y';
結果（垂直出力を使用）：
d | 05/25/2030 D | Saturday, 25 May 2030 f | Saturday, 25 May 2030 23:59 F | Saturday, 25 May 2030 23:59:30 g | 05/25/2030 23:59 G | 05/25/2030 23:59:30 m | May 25 M | May 25 o | 2030-05-25T23:59:30.1234567+07:00 O | 2030-05-25T23:59:30.1234567+07:00 r | Sat, 25 May 2030 16:59:30 GMT R | Sat, 25 May 2030 16:59:30 GMT s | 2030-05-25T23:59:30 t | 23:59 T | 23:59:30 u | 2030-05-25 16:59:30Z U | NULL y | 2030 May Y | 2030 May
例2–アメリカ英語
DECLARE @date datetimeoffset, @culture char(5); SET @date = '2030-05-25 23:59:30.1234567 +07:00'; SET @culture = 'en-us'; SELECT FORMAT(@date, 'd', @culture) AS 'd', FORMAT(@date, 'D', @culture) AS 'D', FORMAT(@date, 'f', @culture) AS 'f', FORMAT(@date, 'F', @culture) AS 'F', FORMAT(@date, 'g', @culture) AS 'g', FORMAT(@date, 'G', @culture) AS 'G', FORMAT(@date, 'm', @culture) AS 'm', FORMAT(@date, 'M', @culture) AS 'M', FORMAT(@date, 'o', @culture) AS 'o', FORMAT(@date, 'O', @culture) AS 'O', FORMAT(@date, 'r', @culture) AS 'r', FORMAT(@date, 'R', @culture) AS 'R', FORMAT(@date, 's', @culture) AS 's', FORMAT(@date, 't', @culture) AS 't', FORMAT(@date, 'T', @culture) AS 'T', FORMAT(@date, 'u', @culture) AS 'u', FORMAT(@date, 'U', @culture) AS 'U', FORMAT(@date, 'y', @culture) AS 'y', FORMAT(@date, 'Y', @culture) AS 'Y';
結果（垂直出力を使用）：
d | 5/25/2030 D | Saturday, May 25, 2030 f | Saturday, May 25, 2030 11:59 PM F | Saturday, May 25, 2030 11:59:30 PM g | 5/25/2030 11:59 PM G | 5/25/2030 11:59:30 PM m | May 25 M | May 25 o | 2030-05-25T23:59:30.1234567+07:00 O | 2030-05-25T23:59:30.1234567+07:00 r | Sat, 25 May 2030 16:59:30 GMT R | Sat, 25 May 2030 16:59:30 GMT s | 2030-05-25T23:59:30 t | 11:59 PM T | 11:59:30 PM u | 2030-05-25 16:59:30Z U | NULL y | May 2030 Y | May 2030
例3–英国
DECLARE @date datetimeoffset, @culture char(5); SET @date = '2030-05-25 23:59:30.1234567 +07:00'; SET @culture = 'en-gb'; SELECT FORMAT(@date, 'd', @culture) AS 'd', FORMAT(@date, 'D', @culture) AS 'D', FORMAT(@date, 'f', @culture) AS 'f', FORMAT(@date, 'F', @culture) AS 'F', FORMAT(@date, 'g', @culture) AS 'g', FORMAT(@date, 'G', @culture) AS 'G', FORMAT(@date, 'm', @culture) AS 'm', FORMAT(@date, 'M', @culture) AS 'M', FORMAT(@date, 'o', @culture) AS 'o', FORMAT(@date, 'O', @culture) AS 'O', FORMAT(@date, 'r', @culture) AS 'r', FORMAT(@date, 'R', @culture) AS 'R', FORMAT(@date, 's', @culture) AS 's', FORMAT(@date, 't', @culture) AS 't', FORMAT(@date, 'T', @culture) AS 'T', FORMAT(@date, 'u', @culture) AS 'u', FORMAT(@date, 'U', @culture) AS 'U', FORMAT(@date, 'y', @culture) AS 'y', FORMAT(@date, 'Y', @culture) AS 'Y';
結果（垂直出力を使用）：
d | 25/05/2030 D | 25 May 2030 f | 25 May 2030 23:59 F | 25 May 2030 23:59:30 g | 25/05/2030 23:59 G | 25/05/2030 23:59:30 m | 25 May M | 25 May o | 2030-05-25T23:59:30.1234567+07:00 O | 2030-05-25T23:59:30.1234567+07:00 r | Sat, 25 May 2030 16:59:30 GMT R | Sat, 25 May 2030 16:59:30 GMT s | 2030-05-25T23:59:30 t | 23:59 T | 23:59:30 u | 2030-05-25 16:59:30Z U | NULL y | May 2030 Y | May 2030
例4–ドイツ語
DECLARE @date datetimeoffset, @culture char(2); SET @date = '2030-05-25 23:59:30.1234567 +07:00'; SET @culture = 'de'; SELECT FORMAT(@date, 'd', @culture) AS 'd', FORMAT(@date, 'D', @culture) AS 'D', FORMAT(@date, 'f', @culture) AS 'f', FORMAT(@date, 'F', @culture) AS 'F', FORMAT(@date, 'g', @culture) AS 'g', FORMAT(@date, 'G', @culture) AS 'G', FORMAT(@date, 'm', @culture) AS 'm', FORMAT(@date, 'M', @culture) AS 'M', FORMAT(@date, 'o', @culture) AS 'o', FORMAT(@date, 'O', @culture) AS 'O', FORMAT(@date, 'r', @culture) AS 'r', FORMAT(@date, 'R', @culture) AS 'R', FORMAT(@date, 's', @culture) AS 's', FORMAT(@date, 't', @culture) AS 't', FORMAT(@date, 'T', @culture) AS 'T', FORMAT(@date, 'u', @culture) AS 'u', FORMAT(@date, 'U', @culture) AS 'U', FORMAT(@date, 'y', @culture) AS 'y', FORMAT(@date, 'Y', @culture) AS 'Y';
結果（垂直出力を使用）：
d | 25.05.2030 D | Samstag, 25. Mai 2030 f | Samstag, 25. Mai 2030 23:59 F | Samstag, 25. Mai 2030 23:59:30 g | 25.05.2030 23:59 G | 25.05.2030 23:59:30 m | 25. Mai M | 25. Mai o | 2030-05-25T23:59:30.1234567+07:00 O | 2030-05-25T23:59:30.1234567+07:00 r | Sat, 25 May 2030 16:59:30 GMT R | Sat, 25 May 2030 16:59:30 GMT s | 2030-05-25T23:59:30 t | 23:59 T | 23:59:30 u | 2030-05-25 16:59:30Z U | NULL y | Mai 2030 Y | Mai 2030
次の表に、各フォーマット文字列の説明を示します。
DECLARE @thedatetimeoffset datetimeoffset = '2030-05-25 23:59:30.1234567 +12:15'; SELECT FORMAT(@thedatetimeoffset, 'd') AS 'd (Short date)', FORMAT(@thedatetimeoffset, 'D') AS 'D (Long date)', FORMAT(@thedatetimeoffset, 'f') AS 'f (Full date/time - short time)', FORMAT(@thedatetimeoffset, 'F') AS 'F (Full date/time - long time)', FORMAT(@thedatetimeoffset, 'g') AS 'g (General date/time - short time)', FORMAT(@thedatetimeoffset, 'G') AS 'G (General date/time - long time)', FORMAT(@thedatetimeoffset, 'm') AS 'm (Month/day)', FORMAT(@thedatetimeoffset, 'M') AS 'M (Month/day)', FORMAT(@thedatetimeoffset, 'o') AS 'o (Round-trip date/time)', FORMAT(@thedatetimeoffset, 'O') AS 'O (Round-trip date/time)', FORMAT(@thedatetimeoffset, 'r') AS 'r (RFC1123)', FORMAT(@thedatetimeoffset, 'R') AS 'R (RFC1123)', FORMAT(@thedatetimeoffset, 's') AS 's (Sortable date/time)', FORMAT(@thedatetimeoffset, 't') AS 't (Short time)', FORMAT(@thedatetimeoffset, 'T') AS 'T (Long time)', FORMAT(@thedatetimeoffset, 'u') AS 'u (Universal sortable date/time)', FORMAT(@thedatetimeoffset, 'U') AS 'U (Universal full date/time)', FORMAT(@thedatetimeoffset, 'y') AS 'y (Year/month)', FORMAT(@thedatetimeoffset, 'Y') AS 'Y (Year/month)';
結果：
d (Short date) | 5/25/2030 D (Long date) | Saturday, May 25, 2030 f (Full date/time - short time) | Saturday, May 25, 2030 11:59 PM F (Full date/time - long time) | Saturday, May 25, 2030 11:59:30 PM g (General date/time - short time) | 5/25/2030 11:59 PM G (General date/time - long time) | 5/25/2030 11:59:30 PM m (Month/day) | May 25 M (Month/day) | May 25 o (Round-trip date/time) | 2030-05-25T23:59:30.1234567+12:15 O (Round-trip date/time) | 2030-05-25T23:59:30.1234567+12:15 r (RFC1123) | Sat, 25 May 2030 11:44:30 GMT R (RFC1123) | Sat, 25 May 2030 11:44:30 GMT s (Sortable date/time) | 2030-05-25T23:59:30 t (Short time) | 11:59 PM T (Long time) | 11:59:30 PM u (Universal sortable date/time) | 2030-05-25 11:44:30Z U (Universal full date/time) | NULL y (Year/month) | May 2030 Y (Year/month) | May 2030