[英]How to query distinct records in mysql
嗨,我想在MySQL中使用distinct查询唯一记录,但问题是它只返回单个列,如何使它返回全部?
这是我的初始查询:
SELECT distinct(country_name)
FROM HST_LOCATION
WHERE person_id='1897'
ORDER BY date_updated DESC
group by country_name
GROUP BY
子句使该列与众不同,无需使用DISTINCT
修饰符。 只需选择所有列,即可得到所需的内容。
SELECT *
FROM HST_LOCATION
WHERE person_id = '1897'
GROUP BY country_name
ORDER BY date_updated DESC
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