sql server olap cube

Technical preparation Based on the SQL SERVER2008R2 version, a simpler case library (Northwind) of Microsoft is used for parsing. First, data connection Data connections are the most commonly used when we write T-SQL statements, and we get the data we want through the association of two tables. SQL Server supports

A cube is a special kind of database that, in its default mode (MOLAP), aggregates data from fact tables and dimension tables in a data warehouse into a separate set of file systems. Aggregated data is improved in statistical performance and allows users to generate simple reports through simple front-end tools such as Excel. This will describe how to make a simple cube. The version used in this article i

parallel level based on the system load, complex queries that consume a large amount of CPU are most suitable for parallel processing. However, Update, Insert, and Delete operations cannot be processed in parallel. 　　8. If you use like for query, you cannot simply use index, but the full-text index consumes space. Like 'a % 'when the index like' % a' is used and like '% a %' is not used for the query, the query time is proportional to the total length of the field value, so the CHAR type cannot

run on the Windows platform. It provides better support for. net programs and is sufficient for general applications. Basically, database products other than SQL Server are rarely used in the. net camp:. net + SQL SERVER + windowsOracle: Most platforms are supported, but the performance in windows is lower than that i

time is proportional to the total length of the field value, so the CHAR type cannot be used, but VARCHAR. Create a full-text index for a long field value. 9. Separate DB Server and APPLication Server; Separate OLTP and OLAP 10. Distributed partition view can be used to implement Database Server consortium. A consorti

impossible to design a system completely according to the standardization. Unless the system is very small, it is necessary to add redundancy in a planned manner after the standardization design. Redundancy can be a redundant database, a redundant table, or a redundant field. redundancy at different granularities can play different roles. Redundancy can be increased for programming convenience or for performance improvement. From a performance perspective, redundant databases can distribute

will still be distributed across two pages-in addition to periodically rebuilding the index, you cannot constantly control the percentage of padding. When the page density needs to be adjusted, the use of filltactor needs to be considered in the following ways: In the case of an OLTP system (often added and removed), a lower fillfactor is required. In the case of OLAP or other systems that are very stable (almost no additions and deleti

Analysis Management Objects (AMO) is the object Model Library of SQL Server SSAS, which allows easy access to and control over objects in SSAS, including Cube,datasource, DataSourceView, Partition, Measure, Dimension, Assembly, role, and DataMining objects. To use it, you must locate the SSAS installation path MicrosoftSQL server90sdkassemblies on the machine, Th

, optimize access methods, and limit the data volume of the result set based on the query conditions. Note that the fill factor should be appropriate (preferably the default value 0 ). The index should be as small as possible. Use a column with a small number of bytes to create an index (refer to the index creation). Do not create a single index for fields with a limited number of values, such as gender fields. 5. Improve Network Speed 6. Expand the server