teradata pivot

ETL Tools: IBM Datastage Informatica PowerCenter Teradata ETL Automation OLAP (On-line Analytical Processing) Microsoft related products: SSAS Olap--rolap--molap Related (to find): OLAP (On-line analysis processing) is a kind of software technology that enables analysts, managers, or executives to access information quickly, consistently and interactively from multiple perspectives to gain a deeper understanding of the data. The goal of OLAP i

Original: http://blog.csdn.net/insistgogo/article/details/77850381, the basic idea of fast sorting:Quick sort using the idea of divide and conquer, the waiting sequence is divided into two parts by a sort of order, and some of the recorded keywords are smaller than the keywords recorded in the other part. The two parts of the records are then sequentially sorted to achieve the order of the entire sequence.2. Three steps to quickly sort:(1) Select Benchmark: In a pending sequence, pick an element

Quick sort the simplest interval segmentation form has been introduced in the previous blog post, is one-way processing, the following describes the quick sort of other forms, are two-way processing, that is, the processing mode is smaller than pivot to the left, more than pivot to move to the right, when the two directions intersect, Move pivot to a position in

);Return;}// Optimization 2: carefully select the partitioning element, that is, pivot// If it is a small-scale array (size // If it is an array of medium size (7 = // If it is a large-scale array (size> 40), take a pseudo-medium number (in the middle of the number s) from the nine specified numbers)Int m = off + (len> 1 );If (len> 7 ){Int l = off;Int n = off + len-1;If (len> 40 ){Int s = len/8;L = med3 (x, l, l + s, l + 2 * s );M = med3 (x, m-s, m,

Chapter 4 Section 3Pivot Table component terminology One of the purposes of designing the pivot table component is to make the table column data source and the multi-dimensional data source user interface consistent with the programming model. Although each type of data source has special requirements, we want the two data sources to be identical in appearance and usage. At the same time, we consider that for business people who only need to extract t

Quick sorting (with Java implementation and analysis) To sum up the quick sorting, if any errors or deficiencies exist, please share with us.1. Fast sorting The idea of fast sorting is similar to that of Merge Sorting. Quick sorting by selecting an element, called a pivot element or sharding element, puts it in a proper position so that the element before it is no greater than it, the element after it is not smaller than it, and then the

Parallel Database for OLTP and OLAPJust ASurvey article on materials in parallel database products andTechnologies for OLTP/OLAP applications. It mainly covers majorCommercial/academic efforts on developing parallel DBMS to solve theEver growing large amount of relational data processing problem.Part I–parallel DBMSs1.1 Parallel Database for OLAP (SHARED-NOTHING/MPP)TeraData–teradata Home–

We have already talked about the basic understanding of fast sequencing in the previous article, see Http://www.cnblogs.com/curo0119/p/8588565.html, and then let's take a closer look at the optimization of the quick row.1, the basic idea of fast sorting:Quick Sort using the idea of divide and conquer, the waiting sequence is divided into two parts by a sort of order, and some of the recorded keywords are smaller than the keywords recorded in the other part. The two parts of the records are then

The pivot and Unpivot relational operators are the new features provided by SQL Server 2005, so when you use pivot and UNPIVOT for databases that are upgraded to SQL Server 2005, the compatibility level of the database must be set to 90 (you can use sp_ Dbcmptlevel stored procedures to set the compatibility level. Using pivot and UNPIVOT in the FROM clause of a q

decomposed into sub problems. There are so many key operations. Pivot selection of the Operation Getpivot, choose which keyword to be divided; a sort operation, according to the selected pivot of the sorting partition function, recursive call interval segmentation operation. Algorithm Implementation Select Pivot To get the p