Xem 1-20 trên 181 kết quả Data manipulation
  • Data Analysis and Presentation Skills: An Introduction for the Life and Medical Sciences is an invaluable text allowing students to develop appropriate key skills when designing experiments, generating results, analysing data and ultimately presenting findings to academics and referees. Taking a hands-on approach, each of these key areas is introduced clearly and carefully, showing how to access and evaluate information using a variety of resources. Basic analytical theory is gradually introduced alongside practical applications to enhance student understanding.

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  • Introduction CHAPTER 1 Relational Database Systems and Oracle CHAPTER 2 Introduction to SQL, iSQL*Plus, and SQL*Plus CHAPTER 3 Data Definition, Part I CHAPTER 4 Retrieval: The Basics CHAPTER 5 Retrieval: Functions CHAPTER 6 Data Manipulation CHAPTER 7 Data Definition, Part II

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  • The first question that I ask an environmental science student who comes seeking my advice on a data analysis problem is Have you looked at your data? Very often, after some beating around the bush, the student answers, Not really. The student goes on to explain that he or she loaded the data into an analysis package provided by an advisor, or downloaded off the web, and it didn’t work. The student tells me, Something is wrong with my data! I then ask my second question: Have you ever used the analysis package with a dataset that did work? After some further beating around the bush,...

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  • SQL commands can be classified in to three types: Data Definition Language commands (DDL) Data Manipulation Language commands (DML) Data Control Language commands (DCL) DDL commands are used to define a database, including creating, altering, and dropping tables and establishing constraints. DML commands are used to maintain and query a database, including updating, inserting, modifying, and querying data. DCL commands are used to control a database including administering privileges and saving of data....

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  • Chapter 1: Relational Database Systems and Oracle „ Chapter 2: Introduction to SQL, AQL*Plus, and SQL Developer „ Chapter 3: Data Definition, Part I „ Chapter 4: Retrieval: The Basics „ Chapter 5: Retrieval: Functions „ Chapter 6: Data Manipulation „ Chapter 7: Data Definition, Part II „ Chapter 8: Retrieval: Multiple Tables and Aggregation „ Chapter 9: Retrieval: Some Advanced Features

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  • There has been a small revolution in data acquisition systems for scientific use in recent years. It was not so long ago that hardware and processing power were expensive. and software nonexistent. Every program had to be written from scratch in a low-level language and, if you did not want your program to.take all night to run, it usually included large chunks of assembler code as well. Nowadays there are many data acquisition systems to choose from, with good hardware and vastly improved software running on fast personal computers....

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  • Before you start working your way through this book, you may ask yourself— Why analyze data? This is an important, basic question, and it has several compelling answers. The simplest need for data analysis arises most naturally in disciplines addressing phenomena that are, in all likelihood, inherently nondeterministic (e.g., feelings and psychology or stock market behavior). Since such fields of knowledge are not governed by known fundamental equations, the only way to generalize disparate observations into expanded knowledge is to analyze those observations.

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  • Tham khảo sách 'microarrays volume 2: applications and data analysis', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Multimedia systems/applications have to deal with the generation of data, manipulation of data, storage of data, presentation of data, and communication of information/data. In this chapter, lets consider some broad implications of the above.

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  • Oracle 10g Data Mining Application Developers guide WW Oracle Database 10g, released in 2003 and the current release, enables grid (the g in 10g) computing. A grid is simply a pool of computers that provides needed resources for applications on an as-needed basis. The goal is to provide comput- ing resources that transparently scale to the user community, much as an electri- cal utility company can deliver power to meet peak demand by accessing energy from other power providers’ plants via a power grid.

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  • What Can SQL do? Execute queries against a database ;Retrieve data from a database ;Insert records in a database ;Updata records in a database ;Delete records in a database ;Create new databases ;Create new tables in database ;Create stored procedures in a database ;Create views in a database ;Set permissions on tables, procedures, and views

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  • This document provides information about Oracle Data Guard broker, a management and monitoring interface that helps you configure, monitor, and control an Oracle Data Guard broker configuration. Oracle Data Guard Broker is intended for database administrators (DBAs) and system administrators who want to use the Oracle Data Guard broker to automate many of the tasks involved in configuring and monitoring an Oracle Data Guard configuration.

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  • Python for Data Analysis is concerned with the nuts and bolts of manipulating, processing, cleaning, and crunching data in Python. It is also a practical, modern introduction to scientific computing in Python, tailored for data-intensive applications. This is a book about the parts of the Python language and libraries you’ll need to effectively solve a broad set of data analysis problems. This book is not an exposition on analytical methods using Python as the implementation language.

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  • The Oracle OLAP DML Reference provides a complete description of the OLAP Data Manipulation Language (OLAP DML) used to define and manipulate analytic workspace objects. Part I briefly describes how to use the OLAP DML. Part II consists of a reference topic for each of the OLAP DML statements. This manual is intended for programmers and database administrators who create and modify analytic workspaces and analytic workspace objects using the OLAP DML

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  • Once your tables have been created, you will need to add new rows, make changes to rows in a table, or delete rows by using data manipulation commands. This lesson covers using SQL commands to make changes to data. A number of these data manipulation commands make up a transaction, which you may either save or delete using transaction controls. At the end of this lesson, you should be able to  Insert new rows into a table.  Update existing rows in a table.  Delete rows from a table.  Explain transaction controls and their importance....

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  • The existence of different autonomous Web sites containing related information has given rise to the problem of integrating these sources effectively to provide a comprehensive integrated source of relevant information. The advent of e-commerce and the increasing trend of availability of commercial data on the Web has generated the need to analyze and manipulate these data to support corporate decision making. Decision support systems now must be able to harness and analyze Web data to provide organizations with a competitive edge.

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  • This book offers practical recipes to solve a variety of common problems that users have with extracting Access data and performing calculations on it. Whether you use Access 2007 or an earlier version, this book will teach you new methods to query data, different ways to move data in and out of Access, how to calculate answers to financial and investment issues, how to jump beyond SQL by manipulating data with VBA, and more.

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  • The distinction between data administration and database administration. The purpose and tasks associated with data administration and database administration. The scope of database security. Why database security is a serious concern for an organization. The type of threats that can affect a database system. How to protect a computer system using computer-based controls

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  • The help() command prints documentation for the requested topic. The sleep dataset is a built-in dataset in R. It comes from William Sealey Gosset’s article under the pseudonym Student (1908). It contains the effects of two drugs, measured as the extra hours of sleep as compared to controls. The vectors x1 and x2 are assigned the values of the extra hours of sleep in drugs 1 and 2, respectively. (a less than sign followed by a minus sign,

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  • Purpose and importance of SQL, the main language for querying relational databases. How to retrieve data using the SELECT statement. How to insert data using the INSERT statement. How to update data using the UPDATE statement. How to delete data using the DELETE statement. About an alternative language for querying relational databases called QBE.

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