DATE_TRUNC
日付を指定された時間単位に切り捨てます。
構文
DATE_TRUNC(unit, time)
引数
| 名前 | 型 | 説明 | 既定値 |
|---|---|---|---|
| unit | string | ||
| time | timestamp |
戻り値
timestamp
例
| unit | time | 出力 |
|---|---|---|
| "millisecond" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-03 04:05:06.789" |
| "second" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-03 04:05:06" |
| "minute" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-03 04:05:00" |
| "hour" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-03 04:00:00" |
| "day" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-03 00:00:00" |
| "week" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-01 00:00:00" |
| "month" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-02-01 00:00:00" |
| "quarter" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-01-01 00:00:00" |
| "year" | timestamp "2021-02-03 04:05:06.789" | timestamp "2021-01-01 00:00:00" |
| "millisecond" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-31 23:59:59.999" |
| "second" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-31 23:59:59" |
| "minute" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-31 23:59:00" |
| "hour" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-31 23:00:00" |
| "day" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-31 00:00:00" |
| "week" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-27 00:00:00" |
| "month" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-12-01 00:00:00" |
| "quarter" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-10-01 00:00:00" |
| "year" | timestamp "2021-12-31 23:59:59.999" | timestamp "2021-01-01 00:00:00" |
| "test" | timestamp "2021-12-31 23:59:59.999" | null |