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2
votes
1answer
191 views

Aren't two writes required to update a clustered index record

I was reading the article on indexes at simple-talk, where it is written that If a heap has a non-clustered index on it (as the primary key), and data is inserted into the table, two writes have ...
5
votes
2answers
4k views

Should I create a nonclustered index on all searchable columns or just each column separately?

I am not sure as to properly use non-clustered indexes. The SSMS plan estimator said to add another index when the following index was on the table already. CREATE NONCLUSTERED INDEX ...
4
votes
1answer
818 views

How are indexes represented in an ERD?

What do indexes look like in an Entity Relationship Diagram? I've googled it and I'm unsure what the standard look of an index is in an ERD. And I'm talking about the crowsfoot diagram that includes ...
5
votes
2answers
267 views

Need for reaching data through clustered index with a non-clustered index

I have found that when a table has both clustered and non-clustered indexes (on different columns), the leaf level non-clustered pages, instead of pointing to the data row, point to the node of the ...