'Null values' diaporamas de présentation

The Problem of Detecting Differentially Expressed Genes

The Problem of Detecting Differentially Expressed Genes. Sample 1. Sample 2. Sample M. Gene 1. Gene 2. . . . . . . . . Gene N. Sample 1. Sample 2. Sample M. Gene 1. Gene 2. . . . . . . . . Gene N. Class 2. Class 1. Fold Change is the Simplest Method

1.22k views • 101 slides

Chapter 5: Advanced SQL

Chapter 5: Advanced SQL. Chapter 5: Advanced SQL. Accessing SQL From a Programming Language Dynamic SQL JDBC and ODBC Embedded SQL SQL Data Types and Schemas Functions and Procedural Constructs Triggers Advanced Aggregation Features OLAP. JDBC and ODBC.

1.11k views • 83 slides

SQL (cont.)

SQL (cont.). Lecture #12. Single-Relation Queries. Null Values. Multi-Relation Queries. Relations as Bags Grouping and Aggregation. Aggregations. SUM, AVG, COUNT, MIN, and MAX can be applied to a column in a SELECT clause to produce that aggregation on the column.

912 views • 75 slides

Bioinformatics Data Management

863 views • 54 slides

Relational Model

Relational Model . Prof. Sharad Mehrotra Information and Computer Science Department University of California at Irvine Chapter 3 and 6 from SKS Chapter 3 in UW. Outline. Relational model basic modeling concepts for schema specification Mapping ER diagrams to Relational Model

856 views • 47 slides

Concepts of Database Management Sixth Edition

Concepts of Database Management Sixth Edition. Chapter 4 The Relational Model 3: Advanced Topics. Objectives. Define, describe, and use views Use indexes to improve database performance Examine the security features of a DBMS Discuss entity, referential, and legal-values integrity.

716 views • 46 slides

SQL

634 views • 44 slides

SIMILARITY OF WEIGHTED DIRECTED ACYCLIC GRAPHS

SIMILARITY OF WEIGHTED DIRECTED ACYCLIC GRAPHS. Presented By: Jing Jin Supervisors: Dr. Virendra C. Bhavsar and Dr. Harold Boley Aug. 31, 2006. Outline. Introduction Schema Matching E-Business & Multi-agent System Tree and Graph Similarity Techniques The wDAG Similarity Algorithm

714 views • 37 slides

Relational Algebra

Relational Algebra. The basic set of operations for the relational model is the relational algebra. enable the specification of basic retrievals The result of a retrieval is a new relation, which may have been formed from one or more relations.

536 views • 34 slides

Object Persistence Design Chapter 13

Object Persistence Design Chapter 13. Alan Dennis, Barbara Wixom, and David Tegarden John Wiley & Sons, Inc. Slides by Fred Niederman Edited by Solomon Negash. Key Definitions. Object persistence involves the selection of a storage format and optimization for performance.

523 views • 32 slides

CBLOCK : An Automatic Blocking Mechanism for Large-Scale Deduplication Tasks

CBLOCK : An Automatic Blocking Mechanism for Large-Scale Deduplication Tasks. Ashwin Machanavajjhala Duke University with Anish Das Sarma , Ankur Jain, Philip Bohannon. What is Deduplication ?.

407 views • 32 slides

Thelma A. Cinco Senior Weather Specialist ,PAGASA Philippines

Thelma A. Cinco Senior Weather Specialist ,PAGASA Philippines. Introduction to Arcview 3.2. Resource Person. LECTURE BY: Ernestine B. Gayban, namria. ArcView Basics. Tool for presenting information Visualize, explore, query, and analyze data geographically Create and edit data Create maps.

318 views • 31 slides

Data Mining

Data Mining. Ryan Benton Center for Advanced Computer Studies University of Louisiana at Lafayette Lafayette, La., USA January 13, 2011. Important Note. This presentation was obtained from Dr. Vijay Raghavan Obtained on January 12, 2011.

414 views • 29 slides

Functions

Functions. Oracle Labs 5 & 6. SQL Functions. Input. Function. Output. arg 1. arg 2. Resulting Value. . . . arg n. SQL Functions. Single-Row Functions Multiple-Row Functions . Single-Row Functions. Acts on each row Can accept multiple arguments Column name Variable name

451 views • 28 slides

Introduction to PL/SQL

Introduction to PL/SQL . CIS 310 Spring, 2012. What is PL/SQL . Procedural Language SQL Transaction Processing Language Uses Program Blocks Similar to COBOL Syntax similar to VB and to JAVA Provides Control Structures IF logic, Looping, etc.

363 views • 25 slides

SQL Group Functions

SQL Group Functions. Chapter Objectives. Differentiate between single-row and multiple-row functions Use the SUM and AVG functions for numeric calculations Use the COUNT function to return the number of records containing non-NULL values Use COUNT(*) to include records containing NULL values.

350 views • 20 slides

Data Quality

Data Quality. Class 3. Goals. Dimensions of Data Quality Data Extraction, Transformation, and Loading Data Cleansing Project. Dimensions of Data Quality. Poor data quality is similar to obscenity- It seems as if there are no real ways to measure it, but you know it when you see it!

379 views • 18 slides

DATABASES

DATABASES. Jyh-haw Yeh Dept. of Computer Science Boise State University. What is a database?. A collection of related data, stored in a structured way. It represents some aspects of real world. Databases are created and maintained by a DBMS (DataBase Management System).

326 views • 16 slides

Linked Lists

219 views • 15 slides

Table Design Considerations

167 views • 5 slides