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    Therewillbedecreasingperformanceoforaclebydeletewholetablean

    來源:懂視網 責編:小采 時間:2020-11-09 15:11:49
    文檔

    Therewillbedecreasingperformanceoforaclebydeletewholetablean

    Therewillbedecreasingperformanceoforaclebydeletewholetablean:There is a project that need collecting periodically (2 months) data into one table and then exporting it as excel file. The table is a temporary table, the app do that delete from tb_name;insert into tb_name values........insert into tb_n
    推薦度:
    導讀Therewillbedecreasingperformanceoforaclebydeletewholetablean:There is a project that need collecting periodically (2 months) data into one table and then exporting it as excel file. The table is a temporary table, the app do that delete from tb_name;insert into tb_name values........insert into tb_n

    There is a project that need collecting periodically (2 months) data into one table and then exporting it as excel file. The table is a temporary table, the app do that delete from tb_name;insert into tb_name values........insert into tb_n

    There is a project that need collecting periodically (2 months) data into one table and then exporting it as excel file. The table is a temporary table, the app do that

    delete from tb_name;
    
    insert into tb_name values.....
    ...
    insert into tb_name values.....

    With that method, it would be causing more and more tablespace fragments, and make the performance decresing.

    In other to avoid this disadvantage influences, I suggest programer modify the app as

    truncate table tb_name drop storage;
    
    insert into tb_name select * from ...

    The delete operation will be causing tablespace fragments.

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    文檔

    Therewillbedecreasingperformanceoforaclebydeletewholetablean

    Therewillbedecreasingperformanceoforaclebydeletewholetablean:There is a project that need collecting periodically (2 months) data into one table and then exporting it as excel file. The table is a temporary table, the app do that delete from tb_name;insert into tb_name values........insert into tb_n
    推薦度:
    標簽: project oracle there
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