Date & Time
BigQuery
DATETIME_TRUNC
BigQueryTruncates a DATETIME value to the specified granularity. Supports all date parts from MICROSECOND through YEAR.
Tipe hasil:
DATETIMEDiperbarui: 13 Jun 2026Syntax
SQL
DATETIME_TRUNC(datetime_expression, datetime_part)Parameter
datetime_expressionDATETIMEwajib
The DATETIME value to truncate
datetime_partDATETIME_PARTwajib
Granularity: YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND, etc.
Contoh Penggunaan
Basic Truncation
SQL
1 SELECT 2 dt, 3 DATETIME_TRUNC(dt, HOUR) as hour, 4 DATETIME_TRUNC(dt, DAY) as day, 5 DATETIME_TRUNC(dt, MONTH) as month 6 FROM UNNEST([DATETIME '2024-01-15 14:35:42']) as dt;
Truncate a datetime value to various granularities.
Hasil
| dt | hour | day | month |
|---|---|---|---|
| 2024-01-15T14:35:42 | 2024-01-15T14:00:00 | 2024-01-15T00:00:00 | 2024-01-01T00:00:00 |
Hourly Aggregation
SQL
1 SELECT 2 DATETIME_TRUNC(event_datetime, HOUR) as hour, 3 COUNT(*) as events, 4 SUM(revenue) as total_revenue 5 FROM `project.dataset.sales` 6 GROUP BY hour 7 ORDER BY hour;
Aggregate sales revenue by hour.
Pertanyaan Umum tentang DATETIME_TRUNC
Apa itu fungsi DATETIME_TRUNC di BigQuery?
Truncates a DATETIME value to the specified granularity. Supports all date parts from MICROSECOND through YEAR. Di BigQuery, fungsi DATETIME_TRUNC termasuk dalam kelompok fungsi yang sering digunakan untuk mengolah dan menganalisis data secara efisien.
Bagaimana cara menggunakan DATETIME_TRUNC di BigQuery?
Gunakan sintaks berikut: DATETIME_TRUNC(datetime_expression, datetime_part). Pastikan argumen yang dimasukkan sudah sesuai dengan tipe data yang diharapkan.
Apa nilai yang dikembalikan oleh fungsi DATETIME_TRUNC?
Fungsi DATETIME_TRUNC mengembalikan nilai bertipe DATETIME. Pastikan tipe data hasil sudah sesuai dengan kebutuhan query atau formula kamu. Jika input mengandung nilai NULL, perilaku fungsi dapat berbeda — selalu periksa dokumentasi untuk memastikan hasilnya sesuai ekspektasi.
Apa saja parameter fungsi DATETIME_TRUNC?
Fungsi ini memiliki 2 parameter wajib. Parameter yang digunakan: datetime_expression (DATETIME, wajib): The DATETIME value to truncate; datetime_part (DATETIME_PART, wajib): Granularity: YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND, etc..
Fungsi Terkait
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