How Mysql Handles ORDER BY, GROUP BY, and DISTINCT
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Mysql Replication Tutorial
MySQL Replication Tutorial Lars Thalmann Technical lead Replication, Backup, and Engine Technology Mats Kindahl Lead Developer Replication Technology MySQL Conference and Expo 2008 Concepts 3 MySQL Replication Why? How? 1. High Availability Snapshots (Backup) Possibility of fail-over 1. Client program mysqldump 2. Load-balancing/Scale- With log coordinates out 2. Using backup Query multiple servers InnoDB, NDB 3. Off-site processing Don’t disturb master Binary log 1. Replication Asynchronous pushing to slave 2. Point-in-time recovery Roll-forward Terminology Master MySQL Server • Changes data • Has binlog turned on Master • Pushes binlog events to slave after slave has requested them MySQL Server Slave MySQL Server • Main control point of replication • Asks master for replication log Replication • Gets binlog event from master MySQL Binary log Server • Log of everything executed Slave • Divided into transactional components • Used for replication and point-in-time recovery Terminology Synchronous replication Master • A transaction is not committed until the data MySQL has been replicated (and applied) Server • Safer, but slower • This is available in MySQL Cluster Replication Asynchronous replication • A transaction is replicated after it has been committed MySQL Server • Faster, but you can in some cases loose transactions if master fails Slave • Easy to set up between MySQL servers Configuring Replication Required configuration – my.cnf Replication Master log-bin server_id Replication Slave server_id Optional items in my.cnf – What -
Select Items from Proc.Sql Where Items>Basics
Advanced Tutorials SELECT ITEMS FROM PROC.SQL WHERE ITEMS> BASICS Alan Dickson & Ray Pass ASG. Inc. to get more SAS sort-space. Also, it may be possible to limit For those of you who have become extremely the total size of the resulting extract set by doing as much of comfortable and competent in the DATA step, getting into the joining/merging as close to the raw data as possible. PROC SQL in a big wrJ may not initially seem worth it Your first exposure may have been through a training class. a 3) Communications. SQL is becoming a lingua Tutorial at a conference, or a real-world "had-to" situation, franca of data processing, and this trend is likely to continue such as needing to read corporate data stored in DB2, or for some time. You may find it easier to deal with your another relational database. So, perhaps it is just another tool systems department, vendors etc., who may not know SAS at in your PROC-kit for working with SAS datasets, or maybe all, ifyou can explain yourself in SQL tenus. it's your primary interface with another environment 4) Career growth. Not unrelated to the above - Whatever the case, your first experiences usually there's a demand for people who can really understand SQL. involve only the basic CREATE TABLE, SELECT, FROM, Its apparent simplicity is deceiving. On the one hand, you can WHERE, GROUP BY, ORDER BY options. Thus, the do an incredible amount with very little code - on the other, tendency is frequently to treat it as no more than a data extract you can readily generate plausible, but inaccurate, results with tool. -
High Performance Mysql Other Microsoft .NET Resources from O’Reilly
High Performance MySQL Other Microsoft .NET resources from O’Reilly Related titles Managing and Using MySQL PHP Cookbook™ MySQL Cookbook™ Practical PostgreSQL MySQL Pocket Reference Programming PHP MySQL Reference Manual SQL Tuning Learning PHP Web Database Applications PHP 5 Essentials with PHP and MySQL .NET Books dotnet.oreilly.com is a complete catalog of O’Reilly’s books on Resource Center .NET and related technologies, including sample chapters and code examples. ONDotnet.com provides independent coverage of fundamental, interoperable, and emerging Microsoft .NET programming and web services technologies. Conferences O’Reilly Media bring diverse innovators together to nurture the ideas that spark revolutionary industries. We specialize in docu- menting the latest tools and systems, translating the innovator’s knowledge into useful skills for those in the trenches. Visit con- ferences.oreilly.com for our upcoming events. Safari Bookshelf (safari.oreilly.com) is the premier online refer- ence library for programmers and IT professionals. Conduct searches across more than 1,000 books. Subscribers can zero in on answers to time-critical questions in a matter of seconds. Read the books on your Bookshelf from cover to cover or sim- ply flip to the page you need. Try it today for free. SECOND EDITION High Performance MySQL Baron Schwartz, Peter Zaitsev, Vadim Tkachenko, Jeremy D. Zawodny, Arjen Lentz, and Derek J. Balling Beijing • Cambridge • Farnham • Köln • Sebastopol • Taipei • Tokyo High Performance MySQL, Second Edition by Baron Schwartz, Peter Zaitsev, Vadim Tkachenko, Jeremy D. Zawodny, Arjen Lentz, and Derek J. Balling Copyright © 2008 O’Reilly Media, Inc. All rights reserved. Printed in the United States of America. -
Mysql Administration Contents 1 Introduction 2 Server Configuration
SA|MySQL Administration Page 1 1 -- From Linux command-line: MySQL Administration 2 sudo install mysql-server mysql by Terry Sergeant 3 sudo mysql_secure_installation 4 mysql -u root 5 Contents 6 -- now we are in the MySQL client: 7 SELECT user, host, authentication_string, plugin FROM mysql.user; 1 Introduction 1 8 ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'; 1.1 Installation . 1 9 FLUSH PRIVILEGES; 1.2 First Steps . 1 10 \q 1.3 Some Other Useful Commands . 1 11 12 -- Back at Linux command-line ... test new password 2 Server Configuration 1 13 mysql -u root -p 2.1 SQL Mode . 1 2.2 Logging . 2 1.3 Some Other Useful Commands 3 MySQL Clients 2 From Linux command-line: 4 Data Types 2 1 systemctl status mysql 4.1 Numeric . 2 2 systemctl restart mysql 4.2 Character . 2 3 systemctl enable mysql 4.3 Binary . 2 4 systemctl is-enabled mysql 4.4 Temporal . 2 4.5 Other . 2 From MySQL command-line: 5 Obtaining Metadata 3 1 show databases; 2 use DBNAME; 6 Storage Engines 3 3 show tables; 6.1 MyISAM (default) . 3 4 desc TNAME; 6.2 InnoDB . 3 5 create database DBNAME; 6.3 InnoBase . 3 6 source SQLFILE; -- same as \. SQLFILE 6.4 MEMORY . 3 7 select @@datadir; 6.5 Other Engines . 3 7 Security and User Management 3 2 Server Configuration 7.1 Risks . 3 7.2 Some Commands . 3 Here are some common ways to tweak the server's configuration. 8 Backup and Recovery 4 mysqld --verbose --help (to see runtime options sup- 8.1 Backup Types . -
Navicat Wine En.Pdf
Table of Contents Getting Started 8 System Requirements 9 Registration 9 Installation 10 Maintenance/Upgrade 11 End-User License Agreement 11 Connection 17 Navicat Cloud 18 General Settings 21 Advanced Settings 24 SSL Settings 27 SSH Settings 28 HTTP Settings 29 Server Objects 31 MySQL/MariaDB Objects 31 MySQL Tables 31 MySQL/MariaDB Table Fields 32 MySQL/MariaDB Table Indexes 34 MySQL/MariaDB Table Foreign Keys 35 MySQL/MariaDB Table Triggers 36 MySQL/MariaDB Table Options 37 MySQL/MariaDB Views 40 MySQL/MariaDB Functions/Procedures 41 MySQL/MariaDB Events 43 Oracle Objects 44 Oracle Data Pump (Available only in Full Version) 44 Oracle Data Pump Export 45 Oracle Data Pump Import 48 Oracle Debugger (Available only in Full Version) 52 Oracle Physical Attributes/Default Storage Characteristics 53 Oracle Tables 55 Oracle Normal Tables 55 Oracle Table Fields 55 Oracle Table Indexes 57 Oracle Table Foreign Keys 58 Oracle Table Uniques 59 Oracle Table Checks 59 Oracle Table Triggers 60 Oracle Table Options 61 Oracle External Tables 62 2 Fields for Oracle External Tables 62 External Properties for Oracle External Tables 63 Access Parameters for Oracle External Tables 64 Oracle Index Organized Tables 64 Options for Oracle Index Organized Tables 64 Oracle Views 65 Oracle Functions/Procedures 66 Oracle Database Links 68 Oracle Indexes 68 Oracle Java 71 Oracle Materialized Views 72 Oracle Materialized View Logs 75 Oracle Packages 76 Oracle Sequences 77 Oracle Synonyms 78 Oracle Triggers 78 Oracle Types 81 Oracle XML Schemas 82 Oracle Recycle Bin -
Mysql Database Administrator
MySQL Database Administrator Author: Kacper Wysocki Contact: [email protected] Date: December 2010 License: Creative Commons: CC BY-SA Oslo, December 2010, CC BY-SA Contents Introduction 5 Introductions everybody 5 About this course 5 Course outline 6 Course schedule 6 How to do excersies 6 MySQL: history and future 6 MySQL: the present 7 MySQL: the future 7 MySQL compared to other DBs 7 MySQL language support 8 Embedding MySQL 8 Getting help with MySQL 8 MySQL architecture 9 Modular architecture 9 The MySQL modules 9 Client/server architecture 10 Installing MySQL 10 Installation process 10 Distribution packages 11 MySQL official binaries 11 Deploying sandboxes 12 Installing from source 13 Server Startup and Shutdown 14 MySQL relevant files 15 Excersises: Installation 15 Upgrading MySQL 16 Clients: the mysql* suite 16 Client: mysql 16 Excersise: Client mysql 16 Excersise: mysql CLI 17 Further CLI fun 17 Digression: some SQL 18 Client: mysqladmin 18 Excersises: Client: mysql 18 Clients: applications and libraries 18 Oslo, December 2010, CC BY-SA migration 19 Importing data: timezones 19 Importing data 19 Excersises: importing data 20 Excersises: time zones 20 Exporting data 20 Excersises: Exporting data 21 Configuration 21 More configuration 21 Run-time Variables 22 MySQL Architecture 23 Storage Engines 23 Storage Engines 23 Storage Engines types 23 MyISAM 24 MYISAM_MRG 24 InnoDB 24 Excersises: InnoDB 24 FEDERATED 25 CSV 25 ARCHIVE 25 MEMORY 25 BLACKHOLE 25 So... which engine? 26 Engine Excersises 26 Implementing Security 26 -
Database Foundations 6-8 Sorting Data Using ORDER BY
Database Foundations 6-8 Sorting Data Using ORDER BY Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Roadmap Data Transaction Introduction to Structured Data Definition Manipulation Control Oracle Query Language Language Language (TCL) Application Language (DDL) (DML) Express (SQL) Restricting Sorting Data Joining Tables Retrieving Data Using Using ORDER Using JOINS Data Using WHERE BY SELECT You are here DFo 6-8 Copyright © 2015, Oracle and/or its affiliates. All rights reserved. 3 Sorting Data Using ORDER BY Objectives This lesson covers the following objectives: • Use the ORDER BY clause to sort SQL query results • Identify the correct placement of the ORDER BY clause within a SELECT statement • Order data and limit row output by using the SQL row_limiting_clause • Use substitution variables in the ORDER BY clause DFo 6-8 Copyright © 2015, Oracle and/or its affiliates. All rights reserved. 4 Sorting Data Using ORDER BY Using the ORDER BY Clause • Sort the retrieved rows with the ORDER BY clause: – ASC: Ascending order (default) – DESC: Descending order • The ORDER BY clause comes last in the SELECT statement: SELECT last_name, job_id, department_id, hire_date FROM employees ORDER BY hire_date ; DFo 6-8 Copyright © 2015, Oracle and/or its affiliates. All rights reserved. 5 Sorting Data Using ORDER BY Sorting • Sorting in descending order: SELECT last_name, job_id, department_id, hire_date FROM employees 1 ORDER BY hire_date DESC ; • Sorting by column alias: SELECT employee_id, last_name, salary*12 annsal 2 FROM employees ORDER BY annsal ; DFo 6-8 Copyright © 2015, Oracle and/or its affiliates. All rights reserved. 6 Sorting Data Using ORDER BY Sorting • Sorting by using the column's numeric position: SELECT last_name, job_id, department_id, hire_date FROM employees 3 ORDER BY 3; • Sorting by multiple columns: SELECT last_name, department_id, salary FROM employees 4 ORDER BY department_id, salary DESC; DFo 6-8 Copyright © 2015, Oracle and/or its affiliates. -
Database SQL Call Level Interface 7.1
IBM IBM i Database SQL call level interface 7.1 IBM IBM i Database SQL call level interface 7.1 Note Before using this information and the product it supports, read the information in “Notices,” on page 321. This edition applies to IBM i 7.1 (product number 5770-SS1) and to all subsequent releases and modifications until otherwise indicated in new editions. This version does not run on all reduced instruction set computer (RISC) models nor does it run on CISC models. © Copyright IBM Corporation 1999, 2010. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents SQL call level interface ........ 1 SQLExecute - Execute a statement ..... 103 What's new for IBM i 7.1 .......... 1 SQLExtendedFetch - Fetch array of rows ... 105 PDF file for SQL call level interface ....... 1 SQLFetch - Fetch next row ........ 107 Getting started with DB2 for i CLI ....... 2 SQLFetchScroll - Fetch from a scrollable cursor 113 | Differences between DB2 for i CLI and embedded SQLForeignKeys - Get the list of foreign key | SQL ................ 2 columns .............. 115 Advantages of using DB2 for i CLI instead of SQLFreeConnect - Free connection handle ... 120 embedded SQL ............ 5 SQLFreeEnv - Free environment handle ... 121 Deciding between DB2 for i CLI, dynamic SQL, SQLFreeHandle - Free a handle ...... 122 and static SQL ............. 6 SQLFreeStmt - Free (or reset) a statement handle 123 Writing a DB2 for i CLI application ....... 6 SQLGetCol - Retrieve one column of a row of Initialization and termination tasks in a DB2 for i the result set ............ 125 CLI application ............ 7 SQLGetConnectAttr - Get the value of a Transaction processing task in a DB2 for i CLI connection attribute ......... -
Firebird 3 Windowing Functions
Firebird 3 Windowing Functions Firebird 3 Windowing Functions Author: Philippe Makowski IBPhoenix Email: pmakowski@ibphoenix Licence: Public Documentation License Date: 2011-11-22 Philippe Makowski - IBPhoenix - 2011-11-22 Firebird 3 Windowing Functions What are Windowing Functions? • Similar to classical aggregates but does more! • Provides access to set of rows from the current row • Introduced SQL:2003 and more detail in SQL:2008 • Supported by PostgreSQL, Oracle, SQL Server, Sybase and DB2 • Used in OLAP mainly but also useful in OLTP • Analysis and reporting by rankings, cumulative aggregates Philippe Makowski - IBPhoenix - 2011-11-22 Firebird 3 Windowing Functions Windowed Table Functions • Windowed table function • operates on a window of a table • returns a value for every row in that window • the value is calculated by taking into consideration values from the set of rows in that window • 8 new windowed table functions • In addition, old aggregate functions can also be used as windowed table functions • Allows calculation of moving and cumulative aggregate values. Philippe Makowski - IBPhoenix - 2011-11-22 Firebird 3 Windowing Functions A Window • Represents set of rows that is used to compute additionnal attributes • Based on three main concepts • partition • specified by PARTITION BY clause in OVER() • Allows to subdivide the table, much like GROUP BY clause • Without a PARTITION BY clause, the whole table is in a single partition • order • defines an order with a partition • may contain multiple order items • Each item includes -
ZRM for Mysql Performance Benchmarks
Backup and recovery benchmarks for MyISAM and InnoDB engines with Zmanda Recovery Manager for MySQL. By Dmitri Joukovski and Shailen Patel "As MySQL gains widespread adoption and moves more broadly into the enterprise, ZRM for MySQL addresses the growing need among database administrators to protect their digital assets with a comprehensive backup and recovery solution. Zmanda is a valued member of MySQL's ecosystem, and their open source backup solutions are an excellent complement to MySQL's open source database offerings." Marten Mickos, CEO of MySQL AB. Abstract This document provides backup and recovery benchmarks for MyISAM and InnoDB engines with logical, raw and snapshot methods of backup available in ZRM for MySQL. Please send your comments to [email protected] The MySQL database has become the world's most popular open source database because of its consistent fast performance, high reliability and ease of use. The DBAs also expect performance, robustness and ease of use from a backup solution for MySQL. Often times we are asked what performance to expect from Zmanda Recovery Manager (ZRM) for MySQL. This document describes our first results in measuring ZRM backup and recovery performance. Testing configuration 2 x 2.8Ghz/800 FSB Xeon server 4GB ECC/Registered 333Mhz RAM 9500S-12MI 3Ware SATA Controller 230 GB RAID 1 system array 2.27 TB RAID 0 data array All Disks 7200 RPM Operating System - Red Hat Enterprise Linux AS 4 with 2.6.12 kernel Backup of MySQL version 5.0 database MyISAM and InnoDB storage engines Version 1.1 of Enterprise Edition ZRM for MySQL According to 3Ware, the 9500 SATA controller supports a transfer rate of approximately 400 MB/s. -
Aggregate Order by Clause
Aggregate Order By Clause Dialectal Bud elucidated Tuesdays. Nealy vulgarizes his jockos resell unplausibly or instantly after Clarke hurrah and court-martial stalwartly, stanchable and jellied. Invertebrate and cannabic Benji often minstrels some relator some or reactivates needfully. The default order is ascending. Have exactly match this assigned stream aggregate functions, not work around with security software development platform on a calculation. We use cookies to ensure that we give you the best experience on our website. Result output occurs within the minimum time interval of timer resolution. It is not counted using a table as i have group as a query is faster count of getting your browser. Let us explore it further in the next section. If red is enabled, when business volume where data the sort reaches the specified number of bytes, the collected data is sorted and dumped into these temporary file. Kris has written hundreds of blog articles and many online courses. Divides the result set clock the complain of groups specified as an argument to the function. Threat and leaves only return data by order specified, a human agents. However, this method may not scale useful in situations where thousands of concurrent transactions are initiating updates to derive same data table. Did you need not performed using? If blue could step me first what is vexing you, anyone can try to explain it part. It returns all employees to database, and produces no statements require complex string manipulation and. Solve all tasks to sort to happen next lesson. Execute every following query access GROUP BY union to calculate these values. -
Mysql GUI Tools Manual Mysql GUI Tools Manual Abstract
MySQL GUI Tools Manual MySQL GUI Tools Manual Abstract This manual describes all the MySQL GUI Tools. Document generated on: 2010-02-04 (revision: 18947) Copyright 2004-2008 MySQL AB, 2009 Sun Microsystems, Inc. This documentation is NOT distributed under a GPL license. Use of this documentation is subject to the following terms: You may create a printed copy of this documentation solely for your own personal use. Conversion to other formats is allowed as long as the actual content is not altered or edited in any way. You shall not publish or distribute this documentation in any form or on any media, except if you distribute the documentation in a manner similar to how Sun disseminates it (that is, electronically for download on a Web site with the software) or on a CD-ROM or similar me- dium, provided however that the documentation is disseminated together with the software on the same medium. Any other use, such as any dis- semination of printed copies or use of this documentation, in whole or in part, in another publication, requires the prior written consent from an au- thorized representative of Sun Microsystems, Inc. Sun Microsystems, Inc. and MySQL AB reserve any and all rights to this documentation not ex- pressly granted above. For more information on the terms of this license, for details on how the MySQL documentation is built and produced, or if you are interested in doing a translation, please contact the http://www.mysql.com/company/contact/. If you want help with using MySQL, please visit either the MySQL Forums or MySQL Mailing Lists where you can discuss your issues with other MySQL users.