a2 design

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For aggregation A0, A1, A2

TheAggregationisoneforthemostimportantthingforimprovingqueryperformanceinSSAS. YoucancreateaggregationmanuallyinAggregationTab -- AdvancedView. AnaggregationistotheresultofanSQLSELECTstatementwithaGROUPBY The Aggregation is one for the most

Basic tutorial 2: Relational Database Design Theory

This section describes the theory of Relational Database Design Based on relational algebra. Function dependency is the basic part, and various paradigms are introduced in the constraints of Pattern Design and their coping problems. 3.1 function

Software Engineering Personal Assignment 01

1. Program Design IdeasReferring to the Random class, first set 3 random numbers, 1 of which are operator random, and the other two are 0 to About integer random number that is the arithmetic of the integer. Then set 3 random numbers, one of which

Hierarchical design of AD10

Mr. Lou, huaqing Vision Embedded College lecturer. 1. Altium Designer 10 Introductory knowledge1.1.1 What is Altium DesignerAltium Designer offers a unified application solution, an upgraded version of Protel (Classic version Protel 99se), all the

PHP object-oriented: Design Mode-singleton Mode)

Http://www.yzswyl.cn/blread-1601.html Today, a friend in the group asked "private function _ construct () {}" to prevent direct new objects? So I also went to the Internet to find a detailed document for analysis. I feel that it is quite good. I

Drawing design as many as alicloud designer.

Document directory 1.3.1 synchronization between the port and the drawing entry: 1.3.2 rename the sub-drawing corresponding to the chart Operator 3.3.1 set room and identifier format 3.3.2 about PCB 3.3.3 View Channel identifier allocation 3.

Waste in software development-Detailed Design

Detailed design is an important part of V model or waterfall development. This stage is responsible for refining the outline design andCodeWrite instructions. It can be said that it is an important link to link up and down. But is the actual

Some design principles in the design pattern

Seven Famous design principles1. Single Duty principle (Srp-single Responsibility Principle)As far as a class is concerned, there should be only one cause for it to change, with a single functionIf a class takes on too much responsibility, it is

Altium Designer multi-channel design

Turn chenzelin2009 csdn Blog: http://blog.csdn.net/chenzelin2009/article/details/5751251#Altium Designer's multi-drawing function feels more convenient; today, I turned down teacher Xu "Altium designer Quick Start" in the introduction of

relational Database design basics (function dependency, lossless connectivity, hold function dependency, paradigm)

Contact (Relationship)1:1 Contact: If each entity in the entity set E1 can only be associated with one entity in the entity set E2, and vice versa, then the entity set E1 to E2 is a one-to-many contact, recorded as 1:1;1:n Contact: One to many,

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