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okhowang

okhowang

V2EX member #108869, joined on 2015-04-03 09:04:52 +08:00
okhowang's recent replies
Jun 3, 2024
Replied to a topic by wh469012917 云计算 阿里云的技术售后,真的是一言难尽
Jan 8, 2020
Replied to a topic by yuxianjiazu Java 获取泛型 Class 问题
可以参考 jackson 的泛型逻辑,传进去一个匿名泛型类
mapper.readValue(jsonString, new TypeReference<Data<String>>() {});
Sep 17, 2019
Replied to a topic by sytnishizuiai MySQL MySQL 语句问题,请问有没有简便的写法
select id,area,freght1 from table1 where freight_1 = (select min(freight_1) from table1 table2 where table2.area = table1.area)
x3
这样只用 3 条
union 可以拿到 但程序还得处理才能知道哪些列是最小的
如果不需要处理 直接 union 也可以
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