horology.sql
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:5k
- --
- -- horology.sql
- --
- --
- -- datetime, timespan arithmetic
- --
- CREATE TABLE TEMP_DATETIME (f1 datetime);
- -- get some candidate input values
- INSERT INTO TEMP_DATETIME (f1)
- SELECT d1 FROM DATETIME_TBL
- WHERE d1 BETWEEN '13-jun-1957' AND '1-jan-1997'
- OR d1 BETWEEN '1-jan-1999' AND '1-jan-2010';
- SELECT '' AS ten, f1 AS datetime
- FROM TEMP_DATETIME
- ORDER BY datetime;
- SELECT '' AS hundred, d.f1 AS datetime, t.f1 AS timespan, d.f1 + t.f1 AS plus
- FROM TEMP_DATETIME d, TIMESPAN_TBL t
- ORDER BY plus, datetime, timespan;
- SELECT '' AS hundred, d.f1 AS datetime, t.f1 AS timespan, d.f1 - t.f1 AS minus
- FROM TEMP_DATETIME d, TIMESPAN_TBL t
- WHERE isfinite(d.f1)
- ORDER BY minus, datetime, timespan;
- SELECT '' AS ten, d.f1 AS datetime, '1980-01-06 00:00 GMT'::datetime AS gpstime_zero,
- d.f1 - '1980-01-06 00:00 GMT'::datetime AS difference
- FROM TEMP_DATETIME d
- ORDER BY difference;
- SELECT '' AS hundred, d1.f1 AS datetime1, d2.f1 AS datetime2, d1.f1 - d2.f1 AS difference
- FROM TEMP_DATETIME d1, TEMP_DATETIME d2
- ORDER BY datetime1, datetime2, difference;
- SELECT '' as fifty, d1 as datetime,
- date_part('year', d1) AS year, date_part('month', d1) AS month,
- date_part('day',d1) AS day, date_part('hour', d1) AS hour,
- date_part('minute', d1) AS minute, date_part('second', d1) AS second
- FROM DATETIME_TBL
- WHERE isfinite(d1) and d1 >= '1-jan-1900 GMT'
- ORDER BY datetime;
- --
- -- abstime, reltime arithmetic
- --
- SELECT '' AS four, f1 AS abstime,
- date_part('year', f1) AS year, date_part('month', f1) AS month,
- date_part('day',f1) AS day, date_part('hour', f1) AS hour,
- date_part('minute', f1) AS minute, date_part('second', f1) AS second
- FROM ABSTIME_TBL
- WHERE isfinite(f1) and f1 <> 'current'::abstime
- ORDER BY abstime;
- --
- -- conversions
- --
- SELECT '' AS ten, f1 AS datetime, date( f1) AS date
- FROM TEMP_DATETIME
- WHERE f1 <> 'current'::datetime
- ORDER BY date;
- SELECT '' AS ten, f1 AS datetime, abstime( f1) AS abstime
- FROM TEMP_DATETIME
- ORDER BY abstime;
- SELECT '' AS five, f1 AS abstime, date( f1) AS date
- FROM ABSTIME_TBL
- WHERE isfinite(f1) AND f1 <> 'current'::abstime
- ORDER BY date;
- SELECT '' AS five, d1 AS datetime, abstime(d1) AS abstime
- FROM DATETIME_TBL WHERE NOT isfinite(d1);
- SELECT '' AS three, f1 as abstime, datetime(f1) AS datetime
- FROM ABSTIME_TBL WHERE NOT isfinite(f1);
- SELECT '' AS ten, f1 AS timespan, reltime( f1) AS reltime
- FROM TIMESPAN_TBL;
- SELECT '' AS six, f1 as reltime, timespan( f1) AS timespan
- FROM RELTIME_TBL;
- DROP TABLE TEMP_DATETIME;
- --
- -- formats
- --
- SET DateStyle TO 'US,Postgres';
- SHOW DateStyle;
- SELECT '' AS sixty_two, d1 AS us_postgres FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS us_postgres FROM ABSTIME_TBL;
- SET DateStyle TO 'US,ISO';
- SELECT '' AS sixty_two, d1 AS us_iso FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS us_iso FROM ABSTIME_TBL;
- SET DateStyle TO 'US,SQL';
- SHOW DateStyle;
- SELECT '' AS sixty_two, d1 AS us_sql FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS us_sql FROM ABSTIME_TBL;
- SET DateStyle TO 'European,Postgres';
- SHOW DateStyle;
- INSERT INTO DATETIME_TBL VALUES('13/06/1957');
- SELECT count(*) as one FROM DATETIME_TBL WHERE d1 = 'Jun 13 1957';
- SELECT '' AS sixty_three, d1 AS european_postgres FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS european_postgres FROM ABSTIME_TBL;
- SET DateStyle TO 'European,ISO';
- SHOW DateStyle;
- SELECT '' AS sixty_three, d1 AS european_iso FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS european_iso FROM ABSTIME_TBL;
- SET DateStyle TO 'European,SQL';
- SHOW DateStyle;
- SELECT '' AS sixty_three, d1 AS european_sql FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
- RESET DateStyle;
- SHOW DateStyle;
- --
- -- formats
- --
- SET DateStyle TO 'US,Postgres';
- SHOW DateStyle;
- SELECT '' AS sixty_two, d1 AS us_postgres FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS us_postgres FROM ABSTIME_TBL;
- SET DateStyle TO 'US,ISO';
- SELECT '' AS sixty_two, d1 AS us_iso FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS us_iso FROM ABSTIME_TBL;
- SET DateStyle TO 'US,SQL';
- SHOW DateStyle;
- SELECT '' AS sixty_two, d1 AS us_sql FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS us_sql FROM ABSTIME_TBL;
- SET DateStyle TO 'European,Postgres';
- SHOW DateStyle;
- INSERT INTO DATETIME_TBL VALUES('13/06/1957');
- SELECT count(*) as one FROM DATETIME_TBL WHERE d1 = 'Jun 13 1957';
- SELECT '' AS sixty_three, d1 AS european_postgres FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS european_postgres FROM ABSTIME_TBL;
- SET DateStyle TO 'European,ISO';
- SHOW DateStyle;
- SELECT '' AS sixty_three, d1 AS european_iso FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS european_iso FROM ABSTIME_TBL;
- SET DateStyle TO 'European,SQL';
- SHOW DateStyle;
- SELECT '' AS sixty_three, d1 AS european_sql FROM DATETIME_TBL;
- SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
- RESET DateStyle;
- SHOW DateStyle;