Oracle datetime hour to second
时间: 2024-05-04 18:19:45 浏览: 22
Oracle datetime data type can store date and time information up to precision of seconds. You can use the TO_CHAR function to convert a datetime value to a character string with the desired format.
To convert a datetime value to a string in the format of 'HH24:MI:SS', you can use the following query:
```
SELECT TO_CHAR(sysdate, 'HH24:MI:SS') FROM dual;
```
This will return the current time in the format of 'HH24:MI:SS'.
If you have a datetime column in a table and you want to extract the time portion in the format of 'HH24:MI:SS', you can use the TO_CHAR function in the SELECT statement.
For example:
```
SELECT TO_CHAR(my_datetime_column, 'HH24:MI:SS') FROM my_table;
```
This will return the time portion of the datetime column in the format of 'HH24:MI:SS'.
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)