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A database structure that can improve the speed of queries at the cost of disk space and slower inserts/updates. It stores a copy of one or more columns sorted but structures the data differently to allow faster access.

7
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1answer
index on it. I'm thinking to change it to a clustered index. Reasons for: Big amount of data (~40 millions rows) Column is used in multiple Where clauses (between, >, <) Column is used in …
asked Jan 27 '15 by Alex Zhukovskiy
2
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1answer
< @DocNewestTreshold AND ReceiveDateTime < t.Treshold)) AND NOT EXISTS (SELECT * FROM [doc].[document] d (NOLOCK) WHERE d.ParentId = di.DocumentId) ) The problem that the query plan always use index scan: I … tried to create an index for every permutation of these 3 columns, but it didn't use it anyway. DocOldestTreshold and @DocNewestTreshold are used to speedup a query, becuase they can be computed …
asked Jul 19 '16 by Alex Zhukovskiy