夏日的圣诞

存储过程代码：delimiter //CREATE PROCEDURE CounterOrder( IN orderstatus VARCHAR(25), OUT total INT) BEGIN SELECT COUNT(orderNumber) INTO total FROM orders WHERE orderstatus = orderstatus; END //delimiter;调用代码：CALL CounterOrder('shipped',@totalxxxx);S

错误代码如下：```powershellNov 27 12:42:47 CentOS7Aron mysqld[6972]: 2020-11-27T04:42:47.350682Z 1 [ERROR] [MY-013168] [InnoDB] Cannot upgrade server earlier than 5.7 to 8.0Nov 27 12:42:52 CentOS7Aron mysqld[6972]: 2020-11-27T04:42:52.352797Z 1 [ERROR] [MY-01

下载地址：https://dev.mysql.com/downloads/mysql/，我下载了上面的187.8M的那个。顺便说一句，最近的新浪微博是真烂了，居然登录不了。之前一直在新浪写。以后改这里吧，突然发现这的风格很喜欢。==================================================下载后，解压，发现完全没有安装文件，然后百度，发现要先创建一个...