com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was51093 seconds ago.The last packet sent successfully to the server was 5 ......
sp 程序 delimiter // create procedure ma() begin declare i int default 0; while i<11 do set i=i+1; select i; end while; end // delimiter ; 1+2+...+9+10 为什么这个程序无法实现累加效果 / ......