写一个循环删除的过程。

createorreplaceproceduredelBigTab(p_TableNameinvarchar2,p_Conditioninvarchar2,p_Countinvarchar2)

as

pragmaautonomous_transaction;

n_deletenumber:=0;

begin

while1=1loop

EXECUTEIMMEDIATE

'deletefrom'||p_TableName||'where'||p_Condition||'andrownum<=:10000'

USINGp_Count;

ifSQL%NOTFOUNDthen

exit;

else

n_delete:=n_delete+SQL%ROWCOUNT;

endif;

commit;

endloop;

commit;

DBMS_OUTPUT.PUT_LINE('Finished!');

DBMS_OUTPUT.PUT_LINE('Totally'||to_char(n_delete)||'recordsdeleted!');

enddelBigTab;

调用：

SQL>settimingon

SQL>execdelBigTab('HS_DLF_DOWNLOG_HISTORY','NUMDLFLOGGUID<11100000','10000');

PL/SQLproceduresuccessfullycompleted.

Elapsed:00:00:18.54

方法虽好，但我应用在一个亿级数据库时还是觉得慢得不行。就算删一点点数据也觉得好象挺慢的。