摘要：
参数定义 ROUND_CEILING Rounding mode to round towards positive infinity. 向正无穷方向舍入 ROUND_DOWN Rounding mode to round towards zero. 向零方向舍入 ROUND_FLOOR Round 阅读全文
摘要：
1、改密码 (1).打开doc命令框键入：sqlplus /nolog (2).输入：connect / as sysdba (3).修改密码：alter user userName identified by passWord; (4).解锁：alter user userName account 阅读全文