结果报错了: Reloading context [/sampletest] 2010-5-15 11:16:51 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc 严重: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 请问这是什么错？是由于用mysql同一用户名在不同的客户端登陆造成了冲突吗？严重: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
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 / ......
