聚集索引
问题描述：
由于聚簇索引，更新SQL查询是否正确？
Is this true that Update SQL Query is slow because of Clustered index??????
答
定义缓慢，当然，聚集索引总是比非聚集索引慢......
Define slow, ofcourse the clustered index will always be slower than a non-clustered index...