sql server columnstore index

The traditional relational database service engine is often not the best platform for analyzing and computing ultra-large amounts of data, so SQL Server has developed an analytics service engine to analyze and calculate large amounts of data. Of course, for the data storage platform SQL Server database engine, there is

Brief introduction After half a day of effort, today finally installed the SQL Server2012. Follow the new information in MSDN (Columnstore Indexes for Fast DW QP SQL Server 11). Tried the next Columnstore Index.

Tags: www color dex exe should see column query add Author Jonathan Allen, translator Sherry A new feature of SQL Server 2016 is the ability to add Columnstore Index (Columnstore Index) on memory-Optimized tables (Optimized table)

function hints. This hints is used in join hints, Query hints, and Table hints. If we specify to use hints it is obvious that the query plan will be overwritten because the SQL Server defaults to using the optimal query on the query, and the hints will probably overwrite the optimal query, so it is generally not recommended, only for the explicit knowledge that this would be better than the default query p

Label:There are two tables in the DW, nonclustered ColumnStore Index is created on littletable and bigtable,bigtable, and the two tables are queried, such as the scirpt below. In the query, Waittype:htmemo and Htbuild appear, the query speed is extremely slow, more than 10 hours can not produce results. Select a few columns,,, from with (nolock) Inner Join with (nolock) on Lt. Int_col1=or Lt. Int

When it comes to Columnstore index, we have to mention the compression technology of SQL Server. Columnstore is the use of SQL Server compression technology.

hints will obviously overwrite the query plan, because SQL Server will use the optimal query on the query by default, it will probably overwrite the optimal query by hints, so it is generally not recommended, and it is only better to know that it will be more experienced than the default query plan. Server users can be a good solution. But for option we can use,

Advantages and Usage ScenariosSQL Server in-memory Columnstore indexes store and manage data by using column-based data stores and column-based query processing. A columnstore index is appropriate for a data warehouse workload that primarily performs bulk load and read-only queries. Using

OverviewSQL Server 2014 is known as a revolutionary version of Microsoft's database, and its performance has been boosted to the greatest extent ever.The updatable Columnstore index, as one of the key features of SQL Server 2014, is a significant contributor to improving que

"Actual execution mode" for an example of query execution plan in batch mode, and two properties are batch.Figure 1-1: Execution plan appears as batchOf course, in the 2014 batch processing mode operators increased a lot, of which outer join is one of them, in short, in performance and limitations, 2014 have significantly improved, this is beyond doubt.Contrast effect.There is no easy way to predict performance improvements when you create a Columnstore