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The first time to see such a SQL statement, do not understand, which used the following less common Aggregate functions: GROUPING Operator used to summarize data: ROLLUP SELECT Case GROUPING (O.customerid) when 0 THEN o.customerid ELSE ' [Total] ' End As Allcustomerssummary, Case GROUPING (Od.orderid) at 0 THEN Od.orderid ELSE-1 end As Individualcustomersummary, SUM (Od.quantity*od.unitprice) as Pri
provide effective support for reducing customer churn and improving customer management levels.The main components of the analysis service are business Intelligence development Studio (Bids). Bids is a management tool that provides an integrated platform for Integration Services, Reporting Services, analytics services, and data mining. Visual Studio 2008-based bids enables users to develop business intelligence applications that allow users to write code, debug, and version control in the platf
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 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
value, so you cannot use the char type, but varchar. A full-text index that is long for a field's value.9, DB server and Application server separation; OLTP and OLAP separationTen, distributed partitioned views can be used to implement a federation of database servers. A consortium is a set of separately managed servers, but they work together to share the proce
"Guide" This article describes how to build a simple data warehouse in SQL Server and analyze related issues. Basic concepts: 1. Cubes: Cubes are the primary object in online analytical processing (OLAP) and are a technology that allows fast access to data in a data warehouse. A cube is a collection of data, typicall
, and if so, how many CPUs can be used. If you set to 4,sqlserver will use 4 cores to process the query, and if set to 1, no degree of parallelism will occur.In step 2, you use option to set up a parallel query on a specific query. Here are two SELECT statements executed simultaneously. The first query uses MAXDOP = 1, which means that queries are not executed with parallelism, whereas the second query uses MAXDOP = 0, meaning that SQL
. 13. Slice: partition data defined by a member of a dimension, called a slice. 14. Data drilling: the end user selects a single unit from a regular, virtual, or linked cube, and retrieve the result set from the source data of the Unit to obtain more detailed information. This operation process is data drilling. 15. Data Mining Model: Data Mining allows you to define a model that contains grouping and prediction rules to apply data in relational datab
This paper gives the basic concept of SQL Server Data Warehouse, and uses the example construction process to analyze, for everyone's reference! Basic concepts: 1. Cubes: Cubes are the primary object of online analytical processing (OLAP) and are a technology that allows fast access to data in a data warehouse. A cube
to get the relevant information. For example, a fast-food manager might want to know: "What about the sales and profits of hamburgers in the last four quarters?" ” In exploratory analysis, the parser may have an understanding of the user's interests, but no need to answer specific questions. For example, a company may know that some of its retail outlets are unprofitable, but don't know why. In an OLAP cube
server| Concept | data 1. Cubes: Cubes are the primary object in online analytical processing (OLAP) and are a technology that allows fast access to data in a data warehouse. A cube is a collection of data, typically constructed from a subset of the Data Warehouse, and organized and summarized into a multidimensional structure defined by a set of dimensions and m
. Select the type of project you want to create (SQL Server script, parsing service script, or SQL move script). Name the project or scenario that you created. Select the storage path for the file. Point OK. You can then define different data sources (if the project you are creating touches more than one database) or add a file that is easily added (just rig
server| Access | server Configure the SQL Server Analysis server to be accessed via HTTP Its HTTP access mechanism is the same as SQL2000 analysis, which enables access to the Analysis server by adding Application Mappings (ISAPI
Tags: Scroll method prepare win section data body multiple ICAThe most obvious feature of SQL differs from other programming languages is the order in which the code is processed. In a large number programming language, code is processed in encoded order, but in the SQL language, the first processed clause is the FROM clause, although the SELECT statement first appears, but is almost always finally processe
7.0Rewritten from Sybase code (rewriting Sybase codes), new database engine, OLAP online analytical processing (online analytical Processing)2000:sql Server 2000Performance (performance boost), 64-bit (supports 64-bit architecture), high availability (highly available), Reporting (report)2005:sql
data.Use the database engine to control access and quickly process transactions to meet the demanding needs of the enterprise and the need to process large amounts of data.Use the database engine to create a relational database for online transaction processing or online analytics processing data.This includes creating tables for storing data and database objects such as indexes, views, and stored procedures that are used to view, manage, and secure data.You can use
');--Find Index Select CharIndex (' o ', ' Hello World ', 6);--Find Index Select QuoteName (' Abc[]def '), QuoteName (' 123]45 '); --Exact numbers Select STR (123.456, 2), str (123.456, 3), str (123.456, 4); Select STR (123.456, 9, 2), str (123.456, 9, 3), str (123.456, 6, 1), str (123.456, 9, 6); Select difference (' Hello ', ' HelloWorld ');--compare strings the same Select difference (' Hello ', ' world '); Select difference (' Hello ', ' Llo '); Select difference (' Hello ', ' hel '); Selec
stores intermediate data and results during a query. 3.OLTP and OLAP OLTP is the main application of the traditional relational database, mainly basic, daily transaction processing, such as bank transaction. OLAP is the main application of Data Warehouse system, supports complex analysis operations, focuses on decision support, and provides intuitive and understandable query results. 4. The database object
the return value of the aggregate function.2.3 GROUP by [Expressions] with CUBE | ROLLUP:The first thing to note is that the GROUP by all statement cannot be used with the cube and ROLLUP keywords.First say the cube keyword, and the following is a description of the SQL Server
Server| Solutions | questions Q. What are the main versions of the SQL Server 2005 product line? A. The SQL Server 2005 product family is redesigned to better meet the needs of different customers, and it includes the following versions:
the Name of the current Language. Select @ lock_timeout; -- returns the current lock timeout setting for the current session (MS) Select @ max_connections; -- returns the maximum number of user connections allowed by the SQL Server instance at the same time. Select @ MAX_PRECISION AS 'max Precision '; -- returns the Precision level used by the decimal and numeric data types. Select @ SERVERNAME; -- Name of
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