一内置函数 1 数学函数 Return Type Name (Signature) Description DOUBLE round(DOUBLE a) Returns the rounded BIGINT value of a. 返回对a四舍五入的BIGINT值 DOUBLE round(DOUBLE a, INT d) Returns a rounded to d decimal places. 返回DOUBLE型d的保留n位小数的DOUBLW型的近似值 DOUBLE bround(DOUB…
一.安装数据库,这里使用的是percona-server5..24版本 配置如下 [root@zabbix4_clone:~]# cat /etc/my.cnf # Example MySQL config file for medium systems. # 8核 16G # This is for a system with little memory (16G) where MySQL plays [client] #password = your_password port = sock…