mysql – STR_TO_DATE替换非英文月份名称

在我的
MySQL数据库表中,我需要使用列sHour(varchar)的值更新列sDate(Date).

我试过这个SQL查询:

UPDATE IGNORE `doTable`
SET `sDate` = STR_TO_DATE(`sHour`, '%d-%M-%Y')
WHERE
    `sDate` IS NULL;

输出是:

+-----------+------------+
| sHour     | sDate      |
+-----------+------------+
| 01-ago-18 | NULL       |
| 01-apr-18 | 2018-04-01 |
| 01-feb-18 | 2018-02-01 |
| 01-gen-18 | NULL       |
| 01-giu-18 | NULL       |
| 01-mar-18 | 2018-03-01 |
| 01-nov-18 | 2018-11-01 |
| 01-ott-18 | NULL       |
| 01-set-18 | NULL       |
| 02-ago-18 | NULL       |
+-----------+------------+
10 rows in set

问题是当行sHour不包含英文的月份名称(en_US)时.

例如行:

+-----------+------------+
| sHour     | sDate      |
+-----------+------------+
| 01-ago-18 | NULL       |
+-----------+------------+

不更新,因为月份名称(前三个字母)是前(it_IT)而不是八(en_US).

而是行:

+-----------+------------+
| sHour     | sDate      |
+-----------+------------+
| 01-apr-18 | 2018-04-01 |
+-----------+------------+

更新是因为月份名称-apr-(前三个字母)与意大利语和英语一致.

我尝试过这样的成功:

SET lc_time_names = 'it_IT';

怎么解决这个?

最佳答案 在MYSQL中尝试这个.

我希望我能提供帮助.

UPDATE `doTable`
SET `sDate` = NULL;

UPDATE IGNORE `doTable`
SET `sDate` = STR_TO_DATE(`sHour`, '%d-%M-%Y')
WHERE
    `sDate` IS NULL;

UPDATE `doTable` jjj
JOIN (
    SELECT
        STR_TO_DATE(`sMonth`, '%d-%M-%Y') AS `xDate`
    FROM
        (
            SELECT
                CASE
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('ago') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'aug',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('dic') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'dec',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('gen') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'jan',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('giu') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'jun',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('ott') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'oct',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('set') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'sep',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('lug') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'jul',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            WHEN SUBSTRING_INDEX(
                SUBSTRING_INDEX(`sHour`, '-' ,- 2),
                '-',
                1
            ) IN ('mag') THEN
                CONCAT(
                    SUBSTRING_INDEX(`sHour`, '-', 1),
                    '-',
                    'may',
                    '-',
                    SUBSTRING_INDEX(`sHour`, '-' ,- 1)
                )
            END AS `sMonth`
        FROM
            `doTable`
        WHERE
            `sDate` IS NULL
        ) AS ttt
) AS kkk
SET jjj.`sDate` = kkk.`xDate`
WHERE
    jjj.`sDate` IS NULL;
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