65 lines
3.4 KiB
SQL
65 lines
3.4 KiB
SQL
---
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--- data type 1 : timestamp
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---
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-- format can recognize
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select trunc(timestamp '2021-08-11 20:19:39', 'cc'); -- century
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select trunc(timestamp '2021-08-11 20:19:39', 'yyyy'); -- year
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select trunc(timestamp '2021-08-11 20:19:39', 'q'); -- quarter
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select trunc(timestamp '2021-08-11 20:19:39', 'mm'); -- month
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select trunc(timestamp '2021-08-11 20:19:39', 'j'); -- day
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select trunc(timestamp '2021-08-11 20:19:39', 'dd'); -- day
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select trunc(timestamp '2021-08-11 20:19:39', 'ddd'); -- day
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select trunc(timestamp '2021-08-11 20:19:39', 'hh'); -- hour
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select trunc(timestamp '2021-08-11 20:19:39', 'mi'); -- minute
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-- format can not recognize
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select trunc(timestamp '2021-08-11 20:19:39', 'qq'); -- quarter
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select trunc(timestamp '2021-08-11 20:19:39', 'mmm'); -- month
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select trunc(timestamp '2021-08-11 20:19:39', 'dddd'); -- day
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select trunc(timestamp '2021-08-11 20:19:39', 'hhh'); -- hour
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---
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--- data type 2 : timestamptz
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---
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-- format can recognize
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'cc'); -- century
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'yyyy'); -- year
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'q'); -- quarter
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'mm'); -- month
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'j'); -- day
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'dd'); -- day
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'ddd'); -- day
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'hh'); -- hour
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'mi'); -- minute
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-- format can't recognize
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'qq'); -- quarter
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'mmm'); -- month
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'dddd'); -- day
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select trunc(timestamptz '2021-08-12 08:48:26.366526+08', 'hhh'); -- hour
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---
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--- data type 3 : interval
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---
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-- format can recognize
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'cc'); -- century
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'yyyy'); -- year
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'q'); -- quarter
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'mm'); -- month
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'j'); -- day
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'dd'); -- day
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'ddd'); -- day
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'hh'); -- hour
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'mi'); -- minute
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-- format can not recognize
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'qq'); -- quarter
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'mmm'); -- month
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'dddd'); -- day
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'hhh'); -- hour
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-- not supported
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select trunc(interval '2 years 3 months 4 days 5 hours 6 minutes 7 seconds', 'w'); -- week |