dubbo.xsd和idubbo.xsd的官方地址不可用 http://code.alibabatech.com/schema/dubbo/dubbo.xsd似乎挂了,真是淡淡的忧伤啊,然后就各种报错: schema_reference.4: Failed to read schema document 'http://code.alibabatech.com/schema/dubbo/dubbo.xsd', because 1) could not find the document; 2)
一键安装lnmp后安装可用完美 swoole(一键安装完lnmp重启下,之前出现502一直解决不了,不清楚啥情况) 找到对应php版本,在lnmp文件夹的src 1.安装swoole cd /usr/local/src wget https://github.com/swoole/swoole-src/archive/v1.9.1-stable.tar.gz tar zxvf v1.9.1-stable.tar.gz cd swoole-src-1.9.1-stable /usr/local/p
比如select gid from table group by gid 查询时使用下面的方法查询条数 select count(distinct gid) from table 使用select count(gid) from table group by gid是错误的 这样查询的是分组后 每个组内部的条数
SELECT COUNT(*) AS 多少组数FROM( SELECT id FROM 表 GROUP BY id) subQuery;Mysql,有一个表含有以下字段,uid 发帖人id,title 发帖标题,tc 发帖内容,time 发帖时间,用一条语句算出昨天发帖书大于10的,一共有多少人? select count(*) from (select distinct startperson_id,count(startperson_id) as num from apphome_finan