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SQL优化-同SQL不同执行计划(一)_Mssql系列教程

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Release： 2016-06-07 17:46:50
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 问题来源：CSDN Oracle技术论坛


问题        ：myepoch提出相同SQL因为检索的值，不同执行效率差别巨大。
问题环境：Oracle 10g，tbnc_adminpowerscope表在adminaccount有B树索引，
TBNC_ADMINPOWERSCOPE总记录数：33422行
TBNC_CMSARTICLE总记录数：40782行
结果      ：已经解决，优化后的SQL执行时间，均小于0.032秒
【SQL 1】：
select art.article_id, art.article_title,
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