配一台同时打魔兽世界，加挂3个Q的电脑最便宜配置！？？？

我写select distinct * from ZH_Performance_Dtl a, ZH_Performance_RT b where a.MgrGid = b.MgrGidEx就报“ORA-01114:将块写入文件%s时出现IO错误(块 # %s)”

其中数据结构如下：
CREATE TABLE ZH_Performance_Dtl (
EntGid Varchar2(32) not null,
CreateDate Date Default sysdate not null,
LastupdDate Date Default sysdate not null,
--
UsrGid Varchar2(32) not null,
UsrCode Varchar2(64) null,
UsrName Varchar2(64) null,
ShopGid Varchar2(32) null,
ShopCode Varchar2(64) null,
ShopName Varchar2(64) null,
AssessDate Date null,
AYear int not null,
AMonth int not null,
Stat int Default 0 not null,
--
MgrGid Varchar2(32) null,
MgrCode Varchar2(64) null,
MgrName Varchar2(64) null,
--
A1 DECIMAL(20,4) NULL,
A2 DECIMAL(20,4) NULL,
A3 DECIMAL(20,4) NULL,
A4 DECIMAL(20,4) NULL,
A5 DECIMAL(20,4) NULL,
A6 DECIMAL(20,4) NULL,
B1 Varchar2(1024) null,
SCORE DECIMAL(20