Oracle 11g Functions Comprehensive Guide

Oracle Database 11g OCP Certification All-in-One Exam Guide

SQL函数知识点详解 聚合函数 在SQL中，聚合函数是一类非常重要的函数，主要用于对数据集进行汇总、分析等操作。档将详细介绍几种常用的聚合函数及其用法。 AVG: 计算平均值。例如： SELECT AVG(DISTINCT price) --算平均数 FROM titles WHERE type = 'business'; 此查询计算了类型为“business”的书籍价格的平均值。DISTINCT关键字用于去除重复值后进行计算。 MAX: 获取最大值。例如： SELECT MAX(ytd_sales) --最大数 FROM titles; 这条语句找出表titles中的最大ytd_sales值。 MIN: 获取最小值。例如： SELECT MIN(ytd_sales) --最小数 FROM titles; 该查询返回表titles中的最小ytd_sales值。 SUM: 求和。例如： SELECT type, SUM(price), SUM(advance) --求和 FROM titles GROUP BY type ORDER BY type; 这条SQL语句按type分组，并分别计算每组的price和advance的总和，最后按照type排序。 COUNT: 计数。例如： SELECT COUNT(DISTINCT city) --求个数 FROM authors; 本查询计算了表authors中不同城市的数量。 STDDEV: 统计标准偏差。例如： SELECT STDDEV(royalty) --返回给定表达式中所有值的统计标准偏差 FROM titles; 此查询返回了表titles中royalty字段的所有值的标准偏差。 STDDEV_POP: 填充统计标准偏差。例如： SELECT STDDEVP(royalty) --返回表达式中所有制的填充统计标准偏差 FROM titles; 这条语句计算了所有royalty值的填充标准偏差。 VAR: 统计方差。例如： SELECT VAR(royalty) --统计方差 FROM titles; 这条查询返回了表titles中royalty字段的方差。

☆ 资源说明：☆ [Packt Publishing] Oracle Goldengate 11g开发技巧大全(英文版) [Packt Publishing] Oracle Goldengate 11g Complete Cookbook (E-Book) ☆ 图书概要：☆ Over 60 simple and easy-to-follow recipes to perform various Goldengate administration tasks such as installing, configuring, and maintaining Goldengate replication. Overview Various recipes that will help you to set up Goldengate in various environments. Practical examples of Goldengate management tasks. Step by step instructions with various examples and scripts. ☆ 出版信息：☆ [作者信息] Ankur Gupta [出版机构] Packt Publishing [出版日期] 2013年09月26日 [图书页数] 362页 [图书语言] 英语 [图书格式] PDF格式

This guide provides a foundational understanding of Oracle Database 11g, covering key concepts and practical applications. It is designed to equip beginners with the necessary knowledge to start working with this relational database management system.

Oracle数据库11G初学者指南. 本书介绍了Oracle Database 11g的基本概念和操作，帮助新手快速上手并理解数据库的核心功能。

Oracle Database 11g: The Complete Reference This comprehensive guide provides in-depth coverage of Oracle Database 11g. It includes detailed explanations of database architecture, SQL tuning, PL/SQL programming, and much more, essential for both beginners and experienced users. The book serves as an all-in-one resource for managing and optimizing Oracle databases, with insights on advanced features and performance tuning techniques. Key topics covered include: Database Setup and Installation Data Recovery Security Features Backup and Restoration Performance Optimization This is an essential reference for anyone working with Oracle Database 11g, whether you are an administrator or a developer.

In this Oracle 11g DataGuard guide, we explore the fundamental concepts and administration best practices for managing DataGuard environments. DataGuard is a robust disaster recovery and data availability solution for Oracle databases. It enables high availability by synchronizing a primary database with one or more standby databases. Key DataGuard configurations include physical standby, logical standby, and snapshot standby, each serving distinct use cases for data redundancy and backup. Key Components of Oracle 11g DataGuard Primary Database: The main operational database actively servicing data requests. Standby Database: A backup database maintained as a replica, either in physical or logical standby mode. DataGuard Broker: A management framework that simplifies configuration and monitoring. DataGuard Modes DataGuard offers three protection modes to balance performance and data protection:1. Maximum Protection: Ensures zero data loss by requiring a standby database write for every transaction.2. Maximum Availability: Balances availability with potential minimal data loss if the standby is temporarily unavailable.3. Maximum Performance: Prioritizes performance and reduces overhead on the primary database. Oracle DataGuard provides advanced data management techniques like failover, switchover, and role transitions to enable uninterrupted data access and reliable disaster recovery.

The Oracle 10g documentation provides an in-depth exploration of the system, offering extensive resources and detailed instructions. This documentation is highly comprehensive, covering Oracle 10g architecture, installation, configuration, performance tuning, and troubleshooting. With its complete and thorough insights, this guide is essential for anyone working with Oracle 10g who seeks to maximize efficiency and understanding.

The McGraw-Hill Oracle Database 11g PL/SQL Programming guide, published in March 2008, provides a comprehensive introduction to PL/SQL programming for Oracle Database 11g. This book is ideal for those looking to gain a deeper understanding of database development, stored procedures, and efficient database management with Oracle’s PL/SQL language. Covering topics from basic syntax to advanced features, the book is structured to enhance learning, whether you're a beginner or an experienced developer working with Oracle databases.