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SQL优化-同SQL不同执行计划(一)_Mssql系列教程

WBOY
WBOYOriginal
2016-06-07 17:46:501222browse

 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 10gtbnc_adminpowerscope表在adminaccountB树索引,
TBNC_ADMINPOWERSCOPE总记录数:33422
TBNC_CMSARTICLE总记录数:40782
结果      已经解决,优化后的SQL执行时间,均小于0.032
SQL 1】:
select art.article_id, art.article_title,
Statement:
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