lookup table in data warehouse

Infobright is a column-based database based on unique patented knowledge grid technology. Infobright is an open-source MySQL Data Warehouse solution that introduces the column storage solution, high-strength data compression, and optimized Statistical Computing (Class Infobright is a column-based database based on unique patented knowledge grid technology. Infobr

the attribute of the indicator. For example: "2015-01-12 PV is 1000", then the date (is the 2015-01-12 abstract) is the dimension, PV is the indicator, 1000 is the valueLatitude tableThe dimension table puts the data table that holds the dimension, or the data table of the

enough to reflect a problem. For normal video learning, we should take it seriously and make a summary. We should not be lazy when doing this. After all, we really don't have such a good brain, multi-Summary and multi-summary. Another piece of content is also learned from Shijie. When we clear the text box, we can use a method to traverse the control: 'Declare a control dim TXT as Control' to traverse each control for each TXT in me. controls' if the control type is textbox if typeof txt is tex

Original: Sixth--optimize performance according to execution plan (2)--lookup table/Index ScanObjective:In most cases, table scans or index scans are not an efficient way to return small amounts of data, especially from a large table. These must be found and resolved to impr

When building a data warehouse, we will certainly mention the dimension modeling method. This method is first proposed by Kimball, and its simplest description is to build the Data Warehouse, data mart according to the fact table

hardware value: SQL Server Parallel Data Warehouse integrated with pre-installed hardware and software, integrates the current Microsoft's newest generation of software innovation technology such as xvelocity column storage, polybase, Windows Server-Hyper-V virtualization technology, Storage spaces storage technology drives streamlined and efficient hardware architectures to provide cost-effective advantag

Model design of Data WarehouseA. Data Modeling MethodologyThe design of the Data warehouse model follows the design principle of "top-down and gradual refinement".The design of the model is divided into three stages:1, conceptual modelThe scope and use of the business, from the height of the abstract summary, that is,

the data Warehouse, but a small number of reversal vouchers can affect operations in recent months. The original total Delete+insert, or the Insert new Data + Time range update operation, in the merge where time overrides the scope of the possible reversal can occur. Parameters:1.alter session set workarea_size_policy=manual;alter session set sort_area_size=1073

, the implementation of the relevant data warehouse in the 1000GB scope provides support in its additional functionality. This white paper describes the best practices that are included when architecting an associated data warehouse or data market with a performance perspect

. This is what many vendors once talked about. The two methods can be used flexibly based on different needs. Most db software uses row-based storage, and column-based storage features efficient single-column value compression. When selecting fewer columns, the io requirement is very low and the speed is fast, however, the compression efficiency of Row-store databases is also rapidly improved. Most of the requirements are to select row data for observ

. Second paradigm: If a table is attributed to the first normal form and contains only columns that depend on the primary key, then the second paradigm. Third paradigm: If a table is attributed to the second normal form and contains only those columns that are not transitive and dependent on the primary key, then the third paradigm. Two Information Requirements Modeling: 1. Top-down Modeling approach: T

Original Address http://blog.itpub.net/23659908/viewspace-1118762/ Thank you. model design of Data Warehouse A. Data Modeling Methodology The design of Data warehouse model follows the design principle of "top-down and gradual refinement". Model design is divided into three

According to the author's experience in the Data Warehouse ETL internship in Teradata and Main Street network, we can understand the relationship and difference between them in architecture design. Teradata is generally the enterprise-class data Warehouse, in the Teradata Data