mysql：取group by第一条数据

mysql：取group by第一条数据

示例数据（表enterprise_info）

SELECT * FROM enterprise_info;

目标

步骤一：创建新表

CREATE TABLE n_enterprise_info LIKE enterprise_info;

步骤二：查询并插入结果

INSERT INTO n_enterprise_info(name, gdp, update_time)
SELECT en.name, en.gdp, en.update_time FROM enterprise_info en
JOIN (
SELECT name, max(update_time) up_time
FROM enterprise_info
GROUP BY name ORDER BY update_time DESC
) tmp
ON en.name = tmp.name AND en.update_time = tmp.up_time;

结果示例

SELECT * FROM n_enterprise_info;