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分區(qū)表維護(hù)

發(fā)布時(shí)間：2020-10-15 17:45:35 來(lái)源：網(wǎng)絡(luò) 閱讀：427 作者：zylhsy 欄目：數(shù)據(jù)庫(kù)

背景：

SEND_CONTROL_HIS1分區(qū)表存在大量無(wú)用數(shù)據(jù)，雖不影響性能，但可以刪除部分分區(qū)節(jié)省存儲(chǔ)空間。

--查表空間有哪些對(duì)象

select owner,segment_name,segment_type,partition_name,bytes/1024/1024 As "占據(jù)空間M"

from dba_segments a where a.tablespace_name='PORT_DATA' And segment_name='CONTROL_HIS1'

Order By bytes Desc


實(shí)施步驟：

1、刪除該表上半年分區(qū)

詳見(jiàn)附表2：TRACK_PART19以前的數(shù)據(jù)分區(qū)可刪除

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART4;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART5;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART6;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART7;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART8;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART9;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART10;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART11;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART12;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART13;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART14;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART15;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART16;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART17;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART18;

ALTER TABLE SEND_CONTROL_HIS1 DROP PARTITION TRACK_PART19;


2、清空該表6月份分區(qū)

詳見(jiàn)附表2：TRACK_PART24以前的數(shù)據(jù)分區(qū)可TRUNCATE

ALTER TABLE SEND_CONTROL_HIS1 TRUNCATE PARTITION TRACK_PART20;

ALTER TABLE SEND_CONTROL_HIS1 TRUNCATE PARTITION TRACK_PART21;

ALTER TABLE SEND_CONTROL_HIS1 TRUNCATE PARTITION TRACK_PART22;

ALTER TABLE SEND_CONTROL_HIS1 TRUNCATE PARTITION TRACK_PART23;

ALTER TABLE SEND_CONTROL_HIS1 TRUNCATE PARTITION TRACK_PART24;


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