UNIX_TIMESTAMP - MaxCompute

將日期date轉化為整型的UNIX格式的日期時間值。

命令格式

bigint unix_timestamp(datetime|date|timestamp|string <date>)

參數說明

date：必填。DATETIME、DATE、TIMESTAMP或STRING類型日期值，格式為yyyy-mm-dd、yyyy-mm-dd hh:mi:ss或yyyy-mm-dd hh:mi:ss.ff3。如果輸入為STRING類型，且MaxCompute專案的資料類型版本是1.0，則會隱式轉換為DATETIME類型後參與運算。當開啟新資料類型屬性時，隱式轉換會失敗，此時需要通過cast函數轉換或關閉新資料類型，例如unix_timestamp(cast(... as datetime))。

傳回值說明

返回BIGINT類型，表示UNIX格式日期值。返回規則如下：

date非DATETIME、DATE、TIMESTAMP或STRING類型，或格式不符合要求時，返回報錯。
date值為NULL時，返回NULL。

樣本資料

為便於理解各函數的使用方法，本文為您提供來源資料，基於來源資料提供函數相關樣本。建立表mf_date_fun_t，並添加資料，命令樣本如下。

create table if not exists mf_date_fun_t(
    id      int,
    date1   date,
    datetime1   datetime,
    timestamp1 timestamp,
    date2   date,
    datetime2   datetime,
    timestamp2 timestamp,
    date3 string,
    date4 bigint);
insert into mf_date_fun_t values
(1,DATE'2021-11-29',DATETIME'2021-11-29 00:01:00',TIMESTAMP'2021-01-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-20',123456780),
(2,DATE'2021-11-28',DATETIME'2021-11-28 00:02:00',TIMESTAMP'2021-02-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-21',123456781),
(3,DATE'2021-11-27',DATETIME'2021-11-27 00:03:00',TIMESTAMP'2021-03-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-22',123456782),
(4,DATE'2021-11-26',DATETIME'2021-11-26 00:04:00',TIMESTAMP'2021-04-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-23',123456783),
(5,DATE'2021-11-25',DATETIME'2021-11-25 00:05:00',TIMESTAMP'2021-05-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-24',123456784),
(6,DATE'2021-11-24',DATETIME'2021-11-24 00:06:00',TIMESTAMP'2021-06-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-25',123456785),
(7,DATE'2021-11-23',DATETIME'2021-11-23 00:07:00',TIMESTAMP'2021-07-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-26',123456786),
(8,DATE'2021-11-22',DATETIME'2021-11-22 00:08:00',TIMESTAMP'2021-08-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-27',123456787),
(9,DATE'2021-11-21',DATETIME'2021-11-21 00:09:00',TIMESTAMP'2021-09-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-28',123456788),
(10,DATE'2021-11-20',DATETIME'2021-11-20 00:10:00',TIMESTAMP'2021-10-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-29',123456789);

查詢表mf_date_fun_t中的資料，命令樣本如下：

select * from mf_date_fun_t;
--返回結果。
+------+-------+------------+------------+-------+------------+------------+-------+------------+
| id   | date1 | datetime1  | timestamp1 | date2 | datetime2  | timestamp2 | date3 | date4      |
+------+-------+------------+------------+-------+------------+------------+-------+------------+
| 1    | 2021-11-29 | 2021-11-29 00:01:00 | 2021-01-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-20 | 123456780  |
| 2    | 2021-11-28 | 2021-11-28 00:02:00 | 2021-02-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-21 | 123456781  |
| 3    | 2021-11-27 | 2021-11-27 00:03:00 | 2021-03-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-22 | 123456782  |
| 4    | 2021-11-26 | 2021-11-26 00:04:00 | 2021-04-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-23 | 123456783  |
| 5    | 2021-11-25 | 2021-11-25 00:05:00 | 2021-05-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-24 | 123456784  |
| 6    | 2021-11-24 | 2021-11-24 00:06:00 | 2021-06-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-25 | 123456785  |
| 7    | 2021-11-23 | 2021-11-23 00:07:00 | 2021-07-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-26 | 123456786  |
| 8    | 2021-11-22 | 2021-11-22 00:08:00 | 2021-08-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-27 | 123456787  |
| 9    | 2021-11-21 | 2021-11-21 00:09:00 | 2021-09-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-28 | 123456788  |
| 10   | 2021-11-20 | 2021-11-20 00:10:00 | 2021-10-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-29 | 123456789  |
+------+-------+------------+------------+-------+------------+------------+-------+------------+

使用樣本：待用資料樣本

--返回1237518660。
select unix_timestamp(datetime'2009-03-20 11:11:00'); 
--返回1237518660。
set odps.sql.type.system.odps2=false;
select unix_timestamp('2009-03-20 11:11:00'); 
--返回NULL。
select unix_timestamp(null);

使用樣本：表資料樣本

基於樣本資料，將date1、datetime1和timestamp1列日期轉換為整型的UNIX格式的日期值，命令樣本如下。

--開啟2.0新類型。此命令需要與SQL語句一起提交。
set odps.sql.type.system.odps2=true;
select date1, unix_timestamp(date1) as date1_unix_timestamp, datetime1, unix_timestamp(datetime1) as datetime1_unix_timestamp, timestamp1, unix_timestamp(timestamp1) as timestamp1_unix_timestamp from mf_date_fun_t;

返回結果如下。

+------------+----------------------+---------------------+--------------------------+------------------------------+---------------------------+
| date1      | date1_unix_timestamp | datetime1           | datetime1_unix_timestamp | timestamp1                   | timestamp1_unix_timestamp |
+------------+----------------------+---------------------+--------------------------+------------------------------+---------------------------+
| 2021-11-29 | 1638115200           | 2021-11-29 00:01:00 | 1638115260               | 2021-01-11 00:00:00.123456789 | 1610294400                |
| 2021-11-28 | 1638028800           | 2021-11-28 00:02:00 | 1638028920               | 2021-02-11 00:00:00.123456789 | 1612972800                |
| 2021-11-27 | 1637942400           | 2021-11-27 00:03:00 | 1637942580               | 2021-03-11 00:00:00.123456789 | 1615392000                |
| 2021-11-26 | 1637856000           | 2021-11-26 00:04:00 | 1637856240               | 2021-04-11 00:00:00.123456789 | 1618070400                |
| 2021-11-25 | 1637769600           | 2021-11-25 00:05:00 | 1637769900               | 2021-05-11 00:00:00.123456789 | 1620662400                |
| 2021-11-24 | 1637683200           | 2021-11-24 00:06:00 | 1637683560               | 2021-06-11 00:00:00.123456789 | 1623340800                |
| 2021-11-23 | 1637596800           | 2021-11-23 00:07:00 | 1637597220               | 2021-07-11 00:00:00.123456789 | 1625932800                |
| 2021-11-22 | 1637510400           | 2021-11-22 00:08:00 | 1637510880               | 2021-08-11 00:00:00.123456789 | 1628611200                |
| 2021-11-21 | 1637424000           | 2021-11-21 00:09:00 | 1637424540               | 2021-09-11 00:00:00.123456789 | 1631289600                |
| 2021-11-20 | 1637337600           | 2021-11-20 00:10:00 | 1637338200               | 2021-10-11 00:00:00.123456789 | 1633881600                |
+------------+----------------------+---------------------+--------------------------+------------------------------+---------------------------+

MaxCompute：UNIX_TIMESTAMP