各位 overflow 用户,您好,我一直在寻找如何使用 MySQL 命令将给定的时间转换为 HHhMMmssS ex:28m54s 或 1h22m3s 或 27s
为纯秒数。
输出应该以纯秒为单位,例如:
from: 28m54s -> 1734
from: 1h22m3s -> 4923
from: 27s -> 27
这些值已导入到名为长度的列中。
如果无法做到这一点,第二好的选择是 PHP。这是一份工作,所以复制粘贴答案就可以了:)
MariaDB结构
`title` varchar(255) NOT NULL DEFAULT '',
`embed` varchar(800) NOT NULL,
`description` text NOT NULL,
`keywords` varchar(255) NOT NULL,
`length` int(11) NOT NULL DEFAULT '0',
`source_thumb_url` varchar(255) NOT NULL,
`record_num` int(11) NOT NULL AUTO_INCREMENT
MariaDB [csv_import]> SHOW COLUMNS FROM table_name;
+------------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------------+--------------+------+-----+---------+-------+
| title | varchar(255) | NO | | NULL | |
| embed | varchar(800) | NO | | NULL | |
| description | text | NO | | NULL | |
| keywords | varchar(255) | NO | | NULL | |
| length | int(11) | NO | | NULL | |
| source_thumb_url | varchar(255) | NO | | NULL | |
| record_num | int(11) | NO | PRI | NULL | |
+------------------+--------------+------+-----+---------+-------+
7 rows in set (0.00 sec)
选择字符串
SET @from = '`length`';
SELECT TIME_TO_SEC(STR_TO_DATE(
CONCAT(IF(@from LIKE '%h%', '', '0h'), IF(@from LIKE '%m%', '', '0m'), IF(@from LIKE '%s%', '', '0s'), @from),
'%kh%im%ss')) AS sec;
使用UPDTAE的结果
UPDATE `database_name`.`table_name` SET `length` = SELECT TIME_TO_SEC(STR_TO_DATE(
CONCAT(IF(`length` LIKE '%h%', '', '0h'), IF(`length` LIKE '%m%', '', '0m'), `length`),
'%kh%im%ss'));
返回:错误代码:1064
您的 SQL 语法有误;查看与您的 MariaDB 服务器版本对应的手册,了解在 'select time_to_sec(str_to_date(
CONCAT(IF(length
like '%h%', '', '0h'), I' at line 1
并对表格长度进行了修改
+------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------------+--------------+------+-----+---------+----------------+
| title | varchar(255) | NO | | NULL | |
| embed | varchar(800) | NO | | NULL | |
| description | text | NO | | NULL | |
| keywords | varchar(255) | NO | | NULL | |
| length | varchar(20) | NO | | NULL | |
| source_thumb_url | varchar(255) | NO | | NULL | |
| record_num | int(11) | NO | PRI | NULL | auto_increment |
+------------------+--------------+------+-----+---------+----------------+
7 rows in set (0.00 sec)
更新草莓的回答
SELECT CASE WHEN `length` LIKE '%h%'
THEN TIME_TO_SEC(STR_TO_DATE(`length`,'%hh%im%ss'))
WHEN `length` LIKE '%m%'
THEN TIME_TO_SEC(STR_TO_DATE(`length`,'%im%ss'))
ELSE TIME_TO_SEC(STR_TO_DATE(`length`,'%ss'))
END X;
错误代码:1054 “字段列表”中的未知列“长度”
最佳答案
利用 time_to_sec
和 str_to_date
使用以下查询。
select time_to_sec(str_to_date(
CONCAT(IF(@from like '%h%', '', '0h'), IF(@from like '%m%', '', '0m'), @from),
'%kh%im%ss')) as sec;
演示:
mysql> set @from = '28m54s';
Query OK, 0 rows affected (0.00 sec)
mysql> select time_to_sec(str_to_date(
-> CONCAT(IF(@from like '%h%', '', '0h'), IF(@from like '%m%', '', '0m'), @from),
-> '%kh%im%ss')) as sec;
+------+
| sec |
+------+
| 1734 |
+------+
1 row in set (0.00 sec)
mysql> set @from = '1h22m3s';
Query OK, 0 rows affected (0.00 sec)
mysql> select time_to_sec(str_to_date(
-> CONCAT(IF(@from like '%h%', '', '0h'), IF(@from like '%m%', '', '0m'), @from),
-> '%kh%im%ss')) as sec;
+------+
| sec |
+------+
| 4923 |
+------+
1 row in set (0.00 sec)
mysql> set @from = '27s';
Query OK, 0 rows affected (0.00 sec)
mysql> select time_to_sec(str_to_date(
-> CONCAT(IF(@from like '%h%', '', '0h'), IF(@from like '%m%', '', '0m'), @from),
-> '%kh%im%ss')) as sec;
+------+
| sec |
+------+
| 27 |
+------+
1 row in set (0.00 sec)
根据提供的表结构,您可能需要将 length
列的类型从 int(11)
更改为 varchar(20)
.
新的结构可能是这样的:
`title` varchar(255) NOT NULL DEFAULT '',
`embed` varchar(800) NOT NULL,
`description` text NOT NULL,
`keywords` varchar(255) NOT NULL,
`length` varchar(20) NOT NULL DEFAULT '0',
`source_thumb_url` varchar(255) NOT NULL,
`record_num` int(11) NOT NULL AUTO_INCREMENT
然后在导入之后,使用下面的update
进行所需的转换。
update table_name
set `length` = time_to_sec(str_to_date(
CONCAT(IF(`length` like '%h%', '', '0h'), IF(`length` like '%m%', '', '0m'), `length`),
'%kh%im%ss'));
关于php - MySQL 将时间 minutes_seconds 转换为秒,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36483870/