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执行5分钟还没执行完; explain update ind_shop t1 join (select shop_id,(case when `value`='男装' then 1 when `value`='女装' then 2 when `value`='男女装' then 3 else 0 e 阅读全文
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In single instance environment, when a deadlock happens, it often reports ORA-60, see Document 15476.1 FAQ: Detecting and Resolving Locking Conflicts 阅读全文
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很简单的sql: select * from (select * from issue.db_infoorder by creator_date) where rownum<10 执行计划如下: 此查询需要12秒左右。 创建索引 create index idx_time on db_info(cr 阅读全文