like语句百分号前置会使用到索引吗?
like语句百分号前置会使用到索引吗? 前几天看了这篇文章: 看完了之后,我很想知道这篇文章是不是临时工写的?还是网站的主人写的,网站的主人的微博我都有关注(在微博里私信过) 是某个公司的DBA,这里先不管他是不是临时工写的,今天我也研究一下这个问
like语句百分号前置会使用到索引吗?
前几天看了这篇文章:
看完了之后,我很想知道这篇文章是不是临时工写的?还是网站的主人写的,网站的主人的微博我都有关注(在微博里私信过)
是某个公司的DBA,这里先不管他是不是临时工写的,今天我也研究一下这个问题o(∩_∩)o
说明:我们说的走索引指的是:聚集索引查找、非聚集索引查找
而全表扫描、聚集索引扫描、非聚集索引扫描都不是走索引
而这里说的走索引跟全文搜索/全文索引没有关系 SQLSERVER全文搜索
全文搜索/全文索引已经是另外一种技术了
聚集索引表
SQL脚本如下:
Department( , 6 GroupName NVARCHAR(20) NOT NULL, 7 Company NVARCHAR(20), 8 ) CL_GroupName .(GroupName ASC) Department ( , groupname ) ((((20)) ) Department ,

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