Oracle中大批量删除数据的方法
2016-02-19 10:30
今天图老师小编给大家精心推荐个Oracle中大批量删除数据的方法教程，一起来看看过程究竟如何进行吧！喜欢还请点个赞哦~
create or replace procedure delBigTab(p_TableName in varchar2,p_Condition in varchar2,p_Count in varchar2)
as
pragma autonomous_transaction;
n_delete number:=0;
begin
while 1=1 loop
EXECUTE IMMEDIATE
'delete from '||p_TableName||' where '||p_Condition||' and rownum = :10000'
USING p_Count;
if SQL%NOTFOUND then
exit;
else
n_delete:=n_delete + SQL%ROWCOUNT;
end if;
commit;
end loop;
commit;
DBMS_OUTPUT.PUT_LINE('Finished!');
DBMS_OUTPUT.PUT_LINE('Totally '||to_char(n_delete)||' records deleted!');
end delBigTab;
调用：
SQL set timing on
SQL exec delBigTab('HS_DLF_DOWNLOG_HISTORY','NUMDLFLOGGUID 11100000','10000');
PL/SQL procedure successfully completed.
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。
