由于我用的是thinkphp5,tp5是没有封装分区查询操作的,所以需要用原生的sql语句来进行查询(即不能使用链式查询)。(tp6是可以使用链式查询的) $list = Db::query(select * from 表名 partition (分区名)"); 1. sql的内连接方式: select * from A partition (分区名) inner join B on A.id = B.id ...
...); } 2、使用org.json包对象转换json字符串 org.json org.jsonjson字符串 String json = gson.toJson(user); System.out.println(json); //json字符串转成对象 User user1 =...(json); // json字符串转成对象 JSONObject jsonObject1 = JSONObject.fromObject(json); User user1 = (User...如...
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GECOS 这字段是可选的,通常为了存放信息目的而设的. 通常,它包含了用户的全名. GECOS 意思是通用电气综合操作系统(General Electric Comprehensive Operating System), 当 GE 的大型系统部分割售卖给 Honeywell 时它被改为 GCOS. Dennis Ritchie 作过报告:"有时我们发送印刷品或批道作业到 GCOS机器时,gcos 字段打...
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