Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.w.id' which is not functionally dependent on columns in GROUP BY ...
在php.ini中设置禁用allow_url_fopen和allow_url_include。这将禁用require/include/fopen的远程文件
Mysql的读写分离?(进阶的会遇到)读写分离的实现原理就是在执行SQL语句的时候,判断到底是读操作还是写操作,把读的操作转向到读服务器上(从服务器,一般是多台),写的操作转到写的服务器上(主服务...
碰巧看到MySQL有这种的语法"INTEGER GENERATED ALWAYS AS IDENTITY",一知半解,了解一下。