Although a normal index does not store null key values, cluster indexes store null keys. There is only one entry for each key value in the cluster index. Therefore, a cluster index is likely to be smaller than a normal index on the same set of key values.
Although a normal index does not store null key values, cluster indexes store null keys.
虽然普通的索引不保存空的键值,但cluster index保存空的keys?
为什么cluster index保存空的keys?什么情况呢,搞不明白
请指教