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How To Use Values from Other Tables in UPDATE Statements
How To Use Values from Other Tables in UPDATE Statements? - MySQL FAQs - Understanding SQL INSERT, UPDATE and DELETE Statements If you want to update values in one table with values from another table, you can use a subquery as an expression in the SET clause. The subquery should return only one row...
2007-05-11, 4808👍, 0💬

How To Load Data Files into Tables with "mysqlimport"
How To Load Data Files into Tables with "mysqlimport"? - MySQL FAQs - Administrator Tools for Managing MySQL Server If you want to load a data file directly into a table, you need to prepare the data file as one line per data row, and use tab character as the column delimiter. The data file name sho...
2007-05-11, 4808👍, 0💬

What Are Storage Engines
What Are Storage Engines? - MySQL FAQs - Storage Engines: MyISAM, InnoDB and BDB Storage engines are programs that are integrated into MySQL database management system to manage data tables. MySQL 5.0 supports the following major storage engines: MyISAM Storage Engine - MySQL default storage engine....
2007-05-10, 4808👍, 0💬

How To Drop an Existing Index
How To Drop an Existing Index? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you don't need an existing index any more, you should delete it with the "DROP INDEX indexName ON tableName" statement. Here is an example SQL script: mysql> DROP INDEX tip_subject ON tip; Query OK, ...
2007-05-11, 4805👍, 0💬

How To List All Existing User Accounts
How To List All Existing User Accounts? - MySQL FAQs - Managing User Accounts and Access Privileges MySQL stores all existing user accounts in a table called "mysql.user". If you want see all user accoutns, you can use the "SELECT" command as shown in the tutorial exercise below: >cd \mysql\bin >mys...
2007-05-10, 4805👍, 0💬

How To Present a Past Time in Hours, Minutes and Seconds
How To Present a Past Time in Hours, Minutes and Seconds? - MySQL FAQs - Introduction to SQL Date and Time Handling If you want show an article was posted "n hours n minutes and n seconds ago", you can use the TIMEDIFF(NOW(), pastTime) function as shown in the following tutorial exercise: SELECT TIM...
2007-05-11, 4800👍, 0💬

What Is MySQL
What Is MySQL? - MySQL FAQs - Database Basics and Terminologies MySQL is an open source database management system developed by MySQL AB, http://www.mysql.com.
2007-05-10, 4800👍, 0💬

How To Use Group Functions in the SELECT Clause
How To Use Group Functions in the SELECT Clause? - MySQL FAQs - SQL SELECT Query Statements with GROUP BY If group functions are used in the SELECT clause, they will be used on the rows that meet the query selection criteria, the output of group functions will be returned as output of the query. The...
2007-05-11, 4799👍, 0💬

How To Create a Database
How To Create a Database? - PHP Script Tips - Working with MySQL Database A database in a MySQL server is a logical container used to group tables and other data objects together as a unit. If you are a the administrator of the server, you can create and delete databases using the CREATE/DROP DATABA...
2007-04-18, 4798👍, 0💬

What Are the "mysqld" Command Line Options
What Are the "mysqld" Command Line Options? - MySQL FAQs - Server Daemon mysqld Administration "mysqld" offers a big list of command line options. Here are some commonly used options: "--help" - Displays a short help message on how to use "mysqld". "--verbose --help" - Displays a long help messages ...
2007-05-11, 4792👍, 0💬

What Are Date and Time Data Types
What Are Date and Time Data Types? - MySQL FAQs - Introduction to SQL Date and Time Handling MySQL supports the following date and time data types: DATE - A date in the range of '1000-01-01' and '9999-12-31'. Default DATE format is "YYYY-MM-DD". DATETIME - A date with the time of day in the range of...
2007-05-11, 4791👍, 0💬

How To Create a New Table Using the InnoDB Storage Engine
How To Create a New Table Using the InnoDB Storage Engine? - MySQL FAQs - Storage Engines: MyISAM, InnoDB and BDB InnoDB storage engine was developed by Innobase Oy, which is an Oracle company now. InnoDB is transaction safe, and has been used by a number of large Websites, like Slashdot.org. InnoDB...
2007-05-10, 4791👍, 0💬

What Is "mysqld"
What Is "mysqld"? - MySQL FAQs - Administrator Tools for Managing MySQL Server "mysqld" is MySQL server daemon program which runs quietly in background on your computer system. Invoking "mysqld" will start the MySQL server on your system. Terminating "mysqld" will shutdown the MySQL server. Here is ...
2007-05-11, 4790👍, 0💬

What Are Date and Time Functions
What Are Date and Time Functions? - MySQL FAQs - Introduction to SQL Date and Time Handling MySQL offers a number of functions for date and time values: ADDDATE(date, INTERVAL expr unit) - Adding days to a date. Same as DATE_ADD(). ADDTIME(time1, time2) - Adding two time values together. CURDATE() -...
2007-05-11, 4785👍, 0💬

How To Change the Password for Your Own User Account
How To Change the Password for Your Own User Account? - MySQL FAQs - Managing User Accounts and Access Privileges If you want to change the password of your own user account, you should use your user account connect to the server "mysql" first. You should then use the "SET PASSWORD ..." command to c...
2007-05-10, 4785👍, 0💬

Is the Order of Columns in the SET Clause Important
Is the Order of Columns in the SET Clause Important? - MySQL FAQs - Understanding SQL INSERT, UPDATE and DELETE Statements Yes. The order of columns in the SET clause of the UPDATE statement is important. There is a BIG DIFFERENCE between MySQL and Oracle on update columns with previous values: Orac...
2007-05-11, 4783👍, 0💬

How To Insert Data into an Existing Table
How To Insert Data into an Existing Table? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If you want to insert a row of data into an existing table, you can use the INSERT INTO statement as shown in the following sample script: &lt;?php include "mysql_connection.php"; $sql ...
2007-05-10, 4782👍, 0💬

What Are the Non-Standard SQL Commands Supported by "mysql"
What Are the Non-Standard SQL Commands Supported by "mysql"? - MySQL FAQs - Command-Line End User Interface mysql There are many non-standard SQL commands that are supported by "mysql". Here is short list of some commonly used commands: "SHOW infoName" - Shows basic information of based on the speci...
2007-05-10, 4776👍, 0💬

How To Connect to MySQL Server on a Different Port
How To Connect to MySQL Server on a Different Port? - MySQL FAQs - Server Daemon mysqld Administration If your MySQL server is listening on port number different than 3306, you need to specify "--port=portNumber" option to any client program that needs to connect to the server. The tutorial exercise...
2007-05-11, 4771👍, 0💬

How To Install MySQL
How To Install MySQL? - MySQL FAQs - Downloading and Installing MySQL on Windows MySQL is an open source database management system developed by MySQL AB, http://www.mysql.com. You can download a copy and install it on your local computer very easily. Here is how you can do this: Go to http://dev.my...
2007-05-10, 4771👍, 0💬

How To Add More Data to the Testing Table
How To Add More Data to the Testing Table? - MySQL FAQs - SQL SELECT Query Statements with GROUP BY If you want to continue with other tutorial exercises in this FAQ collection, you need to add more data to the testing table. Follow the script below to add a new column and : mysql> ALTER TABLE fyi_l...
2007-05-11, 4768👍, 0💬

What Is the MySQL Server Daemon - mysqld
What Is the MySQL Server Daemon - mysqld? - MySQL FAQs - Server Daemon mysqld Administration "mysqld" is MySQL server daemon program which runs quietly in background on your computer system. Invoking "mysqld" will start the MySQL server on your system. Terminating "mysqld" will shutdown the MySQL se...
2007-05-11, 4767👍, 0💬

How To Extract a Unit Value from a Date and Time
How To Extract a Unit Value from a Date and Time? - MySQL FAQs - Introduction to SQL Date and Time Handling If you want to extract a specific date or time unit value out of a date or a time, you can use the EXTRACT(unit FROM expression) function. The tutorial exercise below gives you some good examp...
2007-05-11, 4766👍, 0💬

How To Update Values on Multiple Rows
How To Update Values on Multiple Rows? - MySQL FAQs - Understanding SQL INSERT, UPDATE and DELETE Statements If the WHERE clause in an UPDATE matches multiple rows, the SET clause will be applied to all matched rows. This rule allows you to update values on multiple rows in a single UPDATE statement...
2007-05-11, 4765👍, 0💬

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