system默認:managersql
sys默認:change_on_install數據庫
使用SQL Plus登陸數據庫時,system使用密碼manager可直接登陸。ide
但若是是sys用戶,密碼必須加上as sysdba,即完整密碼爲:change_on_install as sysdba登錄
sqlplus: alter user dbaName account unlock; 解鎖登錄帳號密碼
sqlplus: alter user dbaName account lock; 凍結登錄帳號數據
sqlplus: alter user dbaName identified by "password"; 修改登陸帳號密碼db