# statistics statistics

• Oracle syntax of the OVER (PARTITION BY ..) and the window function reproduced

oracle function over the analysis window function and I: analysis of function over Starting from Oracle 8.1.6 to provide analysis functions, analysis functions used to calculate aggregate values based on a certain group, it and the difference between

• oracle function over the analysis window function and

analysis and oracle function over a window function: analysis of function over Starting from Oracle 8.1.6 to provide analysis functions, analysis functions used to calculate aggregate values based on a certain group, it and the difference between agg

• Oracle optimizer optimization method (reproduced)

Oracle is the world's leading information management software developer, database products because of their complex relationship is known. This article describes the Oracle optimizer, it is a non- Often useful tools. Before running a SQL Oracle, firs

• Oracle performance tuning study notes (b) - DBA tools

DBA Tools 1 to develop their own toolkit (2) using the oracle supplied package 3. Regular performance checks 4 track to solve the problem using OEM 5. The use of OEM Timing of application tasks to perform various management tasks automatically resolv

• Oracle: implementation plan: access path connection table, suggesting Statistical information bind variables

SQL execution: Analysis: Hard analysis, soft analysis Implementation Plan: access path (access path), table join (table join), statistics (statistics), bind variable (bind variable), tips (hints) ================================================== ===

• oracle of RBO / CBO optimizer

Oracle's optimizer has two optimization methods, namely, rule-based optimization approach (Rule-Based Optimization, referred to as RBO) and cost-based optimization method (Cost-Based Optimization, referred to as CBO), in Oracle8 and later, Oracle str

• Oracle's optimizer (Optimizer) (CBO optimization) to share

Oracle's optimizer (Optimizer) (CBO optimization) Before running a SQL Oracle, first analyze the statement execution plan, then the execution plan to execute. Analysis of statement execution plan by the optimizer work (Optimizer) to complete. Differe

• Turnover by-day statistics

Function with the statistical analysis of a store's turnover. date sale 1 20 2 15 314 418 530 Rule: by day statistics: statistics every day, the total amount of the previous few days to get results: DATE SALE SUM ----- -------- ------ 12020--1 Day 21

August 1

• Record number of troubleshooting tools for everyday use

1: linux system health check dstat set top, vmstat, iostat, netstat and other functions in one wget http://dag.wieers.com/rpm/packages/dstat/dstat-0.6.7-1.rh7.rf.noarch.rpm rpm-ivh dstat-0.6.7-1.rh7.rf.noarch.rpm Or can be automatically installed wit

• Oracle using sql plus view the execution plan (reprint)

In sql * plus, enter set autotrace on, and then directly execute sql statements; will automatically display the execution plan and statistics. Disadvantages: This method is used to view the sql statement execution time is longer, you need to wait for

• oracle optimizer (rpm)

Before running a SQL Oracle, first analyze the statement execution plan, then the execution plan to execute. Analysis of statement execution plan of work is to optimize device (Optimizer) to complete. Different circumstances, there may be a variety o

• Using Oracle stored procedures to achieve statistical reports of Chinese-style cross

Original link: http://blog.csdn.net/sandloves/archive/2010/06/24/5691836.aspx In many cases, we need to do some Chinese-style statements, such as: We have about a few tables to represent the University's enrollment plan for each province information:

• February Ranking in the browser market

February Ranking in the browser market: U.S. Internet traffic monitoring company Net Applications, today announced February 2011 and the latest browser market share rankings, IE, Chrome, Safari market share growth, Opera, Firefox browser market share

• Introduction to statistical analysis code management

Topo team of enterprise software system to provide a lot of very useful code management capabilities, by means of these features, the software team can improve their work efficiency, Topo code management system include: the depth of view code, code s

• Topo Introduction to statistical analysis code management

Topo team of enterprise software system to provide a lot of very useful code management capabilities, by means of these features, the software team can improve their work efficiency, Topo code management system include: the depth of view code, code s

• oracle optimizer に つ い て

I. PURPOSE: 1, to talk about Oracle's Optimizer and some related knowledge. 2, a table to answer why sometimes there is clearly an index of a field, when observing some of the SQL execution plan and found that the index does not take issue. 3, if you

• How to quickly access the oracle database records the number of rows in the table, do not use select count (1) way

Database version: Oracle 10G Today, the database query in a table under the specific number of records, use select count (1) from [tablename], execute very slow, so I want to see if there is a better way to find the table already exists in the tabs o

• How quick access to oracle database records the number of rows in the table, do not use select count (1) mode

Database Version: Oracle 10G Today, the database query a table under the specific number of records, the use of select count (1) from [tablename], very slow to execute, so I want to see if there is a better way, find the table already exists in the t

• Oracle syntax of the OVER (PARTITION BY ..) and window function

I: analysis of function over Starting from Oracle 8.1.6 to provide analysis functions, analysis functions used to calculate aggregate values based on a certain group, it and the difference between aggregate function is to return multiple rows for eac

• On v \$ mystat, v \$ sesstat, v \$ sysstat difference

1, v \$ statname: statistic # number statistics name the name of the table shows statistics for all statistics, that statistic statistics oracle 10g total of 347 items 2, v \$ mystat: The current session statistics, shows all the statistics in v \$ stat

• On the v \$ mystat, v \$ sesstat, v \$ sysstat difference

1, v \$ statname: statistic # number statistics name the name of the table shows statistics for all statistics, the statistics a total of 347 entries oracle 10g statistics items 2, v \$ mystat: The current session statistics, shows the v \$ statname ite

• oracle optimizer RBO and CBO

During this time, do not torture oracle, silent friends, know that their oracle, do the work in the use frequently, but the configuration, optimization of the things that are in a hazy state. Taiqing say, do not quite understand, so take the time to

• Optimization of an oracle

Oracle's optimizer optimize two ways: That is rule-based optimization method (Rule-Based Optimization, referred to as RBO) Cost-based optimization method (Cost-Based Optimization, referred to as CBO), in Oracle8 and later versions, Oracle strongly re

• Hair water accounting

Hair running account for the development of the retail industry, a free flow accounting software, is the first tailored specifically for individual business management software for free, set water accounting, statistical analysis, inventory managemen

• Curriculum design library management system

1, the system shows This system is mainly used for library readers as well as the management of the museum's library Second, the module shows Readers of all modules 1. Personal information management: View Personal Information: View readers their per

• Using SQL calculate rankings

Project encountered a query, the specific requirements are: number and arrangements need to test a number of student test information query the candidates in this examination arrangements in the ranking, so use your SQL statement: select count(*)+1 a

• Note from the example oracle Some views on the index (Reprinted)

Index (Index) is a common database objects, it's set up good or bad, if properly used, greatly influenced the database application and Database performance. Although there are a lot of information about the usage of the index, DBA and Developer are o

• Zhong: Baidu Webmaster Statistics at testing the bottom line

July 21, 2009, Baidu announced the official launch of "Baidu statistics" system, the first phase of Baidu's business customers for free. August 20, 2009, Baidu formally Statistics Baidu Union partners free. 2009-11-11 latest news, Baidu statisti

• TCP connections and state statistics

Statistics status of TCP connections and connection information to use statistical tools AWK! Using the netstat command, we are the statistics of all connections on the machine. Application tuning and stress testing, often we are concerned that the a

• Liu Shuizhang Software

Hair running account for the development of a set of retail accounting software, this software free of charge. For small clothing stores, small jewelry shops, Taobao shop, shoe store, glasses shops. To meet the daily accounting and statistics. Manage

• Oracle Optimizer Optimizer

Oracle SQL in the implementation of a prior statement must first analyze the execution plan, and then to carry out the implementation plan. Analysis of the implementation plan of the work statement by the optimizer (Optimizer) to complete. Different

Keywords: Project Management (Installed from: http://downpour.javaeye.com/blog/186429) 1. Based on the demand, the project as split Possible scenarios are: a project split, divided into 2-3 separate sub-project development. Currently envisaged in the

• ORACLE CBO brief automatic statistics Statistics

Introducing Oracle 10g automatic statistics CBO statistics function, but the actual use of them is tasteless, bug a lot. Is a brief introduction. 1, see GATHER_STATS_JOB implementation select JOB_NAME, LAST_START_DATE, ENABLED, state from dba_schedul

• Oracle Performance Optimization Basics and Tips

Oracle recently learned some basic knowledge and sql performance optimization of a number of techniques, although each time a project or daily, DBA will conduct our sql audit sql written, but the understanding of relevant knowledge, enable us to more

• How to find customers online

How to find customers online Do you really know how to sell you a network of services and products? If you are on the network can not find your customers, then your sales strategy definitely a problem. Today's networked world will be for you to sell

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