from_unixtime(unix_timestamp
时间: 2023-04-28 20:03:44 浏览: 66
from_unixtime(unix_timestamp)是MySQL中的一个函数,用于将Unix时间戳转换为日期时间格式。其中,unix_timestamp是一个整数,表示从197年1月1日00:00:00 UTC到指定时间的秒数。该函数返回一个字符串,表示指定时间的日期时间格式,例如:2022-01-01 12:00:00。
相关问题
unix_timestamp和from_unixtime
unix_timestamp是一个函数,它用于将日期时间转换为UNIX时间戳,即从1970年1月1日00:00:00 UTC到指定日期时间的秒数。from_unixtime是一个函数,它用于将UNIX时间戳转换为日期时间格式。
hive FROM_UNIXTIME
Hive provides the `FROM_UNIXTIME` function to convert a UNIX timestamp (in seconds) to a string representing the corresponding date and time. The syntax for using `FROM_UNIXTIME` in Hive is as follows:
```
SELECT FROM_UNIXTIME(unix_timestamp) AS formatted_date
FROM your_table;
```
Here, `unix_timestamp` is the column or expression representing the UNIX timestamp you want to convert. `formatted_date` is an optional alias for the resulting formatted date string.
For example, if you have a table named `your_table` with a column `timestamp_col` containing UNIX timestamps, you can use the following query to convert them to formatted dates:
```
SELECT FROM_UNIXTIME(timestamp_col) AS formatted_date
FROM your_table;
```
This will return a result set with the formatted dates corresponding to the UNIX timestamps.