06 2023 档案

Oracle重建data pump（expdpd，impdp）How To Reload Datapump Utility EXPDP/IMPDP (Doc ID 430221.1)
摘要：APPLIES TO: Oracle Database Exadata Express Cloud Service - Version N/A and laterOracle Database Backup Service - Version N/A and laterOracle Database 阅读全文
posted @ 2023-06-09 09:59 阿西吧li 阅读(291) 评论(0) 推荐(0) 编辑
Mysql union all+括号引起的性能问题
摘要：SQL如下(MYSQL版本为8.0.17): select lastname from (select id,loginid,workcode,lastname from HrmResource union all select id,loginid,'' as workcode,lastname 阅读全文
posted @ 2023-06-07 16:19 阿西吧li 阅读(140) 评论(0) 推荐(0) 编辑

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