system默认:managersql
sys默认:change_on_install数据库
使用SQL Plus登陆数据库时,system使用密码manager可直接登陆。ide
但若是是sys用户,密码必须加上as sysdba,即完整密码为:change_on_install as sysdba登录
sqlplus: alter user dbaName account unlock; 解锁登录帐号密码
sqlplus: alter user dbaName account lock; 冻结登录帐号数据
sqlplus: alter user dbaName identified by "password"; 修改登陆帐号密码db