Hướng dẫn sử dụng MySQL part 15 pptx

... you do not know a particu-lar piece of the date.Though MySQL is somewhat forgiving on the input format, your applicationsshould actually attempt to format all date values in MySQL s native format ... avoidany confusion. MySQL always expects the year to be the left-most element of adate format. If you assign illegal values in a SQL operation, MySQL will insertzeroes for that value. MySQL will also ... (2001)Storage1 byteDescriptionStores a year of the Gregorian calendar in the range of 1900 to 2155 .Complex Data Types MySQL s complex data types ENUM and SET are really nothing more than specialstring...

Hướng dẫn sử dụng MySQL part 24 pptx

... 8/24/01Copyright © 2001 O’Reilly & Associates, Inc.ResultSet objects. For databases that do not support a particular kind of metadata,DatabaseMetaData will throw an SQLException.DatabaseMetaData methods ... throws SQLExceptionDescription: Returns the data that makes up the underlying binary object in part or in whole as an array of bytes. You can get a subset of the binary databy specifying a nonzero...

Hướng dẫn sử dụng MySQL part 1 ppt

... andsupport of MySQL. MySQL AB is a Swedish company run by MySQL s core devel-opers. MySQL AB owns the copyright to MySQL as well as the trademark MySQL .Since the initial Internet release of MySQL, ... and contents of a MySQL database or table to a file.mysqlhotcopyPerforms a hot backup of a MySQL database.mysqlimportImports data in different file formats into a MySQL tablemysqlshowShows ... in a file.mysqlaccessManages users.mysqladminEnables you to manage the database server, including the creation and dele-tion of databases.mysqldThe actual MySQL server process.mysqldumpDumps...

Hướng dẫn sử dụng MySQL part 2 pot

... one popular database product: MySQL. We start by introducing you to relational databases and MySQL. We then proceed to show you how to get up and running with MySQL and how to administer it. ... businesses or nonprofit organizations. Alternatively, such users may be a geographically isolated part of a larger company. Or they be individuals interested in maintaining complex personal data, ... get up and running with MySQL and how to administer it. The rest of the book covers the use of MySQL to design, build and support the type of applications important to users like you. What...

Hướng dẫn sử dụng MySQL part 3 docx

... /usr/local /mysql $ chgrp –R mysql /usr/local /mysql Set the ownership of the data directories to the MySQL administrative user you created earlier (for this example, mysql) . $ chown –R mysql /usr/local /mysql/ data ... software MySQL- client-<VERSION>.i386.rpm The MySQL client software MySQL- bench-<VERSION>.i386.rpm MySQL tests and benchmarks. This requires the perl and msql -mysql- modules RPMs. MySQL- devel-<VERSION>.i386.rpm ... /usr/local /mysql $ chgrp –R mysql /usr/local /mysql Set the ownership of the data directories to the MySQL administrative user you created earlier (for this example, mysql) . $ chown –R mysql /usr/local /mysql/ data...

Hướng dẫn sử dụng MySQL part 4 ppt

... Different MySQL Character TypesData TypeStorage for a 144Character StringStorage for a 30Character StringMaximum StringSizeCHAR (150 ) 150 150 255VARCHAR (150 ) 145 31 255TINYTEXT (150 ) 145 ... following tables already exist: mysql& gt; SHOW DATABASES;+ +| Database |+ +| mysql || test |+ +2 rows in set (0.37 sec) mysql& gt;The first database, mysql, is MySQL s system database. You ... Commands end with ; or \g.Your MySQL connection id is 3 to server version: 3.22.29Type 'help' for help. mysql& gt;The mysql command above says to connect to the MySQL server on the localmachine...

Hướng dẫn sử dụng MySQL part 5 pps

... the data directory, we’ll see: $ cd /usr/local /mysql/ data $ ls -l . . -rw-rw 1 mysql mysql 73 Aug 5 17:06 odin-bin.001 -rw-rw 1 mysql mysql 15 Aug 5 17:06 odin-bin.index . . If we inspect ... Associates, Inc. 8$ ls -l . . -rw-rw 1 mysql mysql 203 Aug 5 17:45 odin-bin.001 -rw-rw 1 mysql mysql 73 Aug 5 17:45 odin-bin.002 -rw-rw 1 mysql mysql 30 Aug 5 17:45 odin-bin.index . . ... UNIX system, you can use safe_mysqld to automatically start MySQL at boot. safe_mysqld is found in the bin directory of your MySQL installation (usually /usr/local /mysql/ bin). DRAFT, 8/17/01...

Hướng dẫn sử dụng MySQL part 6 docx

... index that MySQL choose. Key is NULL if no index was chosen. Key_len Key_len lists the length of the index that MySQL choose. This also indicates how many parts of a multi-column index MySQL choose ... sec) This tells us that MySQL will scan all rows in the MySQL table to satisfy the query. This is indicated by the join type of “ALL”. The rows column tells us that MySQL estimates it will ... modified in the MySQL server which may improve your performance. A full reference on these parameters can be found in Chapter 20, or by typing mysqld –help. In general, when tuning MySQL, the two...

Hướng dẫn sử dụng MySQL part 7 pps

... rest of the MySQL installation • The MySQL server should run as a special user and group Since any user who has access to the MySQL data files has access to the MySQL data, the MySQL server ... user, created just for MySQL. The default MySQL installation does this by creating a mysql user and a mysql group. This user and this group have full access to the MySQL data and should ... of flaw with either the MySQL network protocol or the MySQL server code itself. The MySQL network protocol is an open protocol that can be examined by any interested party. Although the protocol...

Hướng dẫn sử dụng MySQL part 8 potx

... one department at a time, so Employee has a one and only one relationship with Department. In the other direction, a department is responsible for many employees. We therefore say Department ... hypo-thetical entities, an Employee and a Department. One possible relationship between the two is that an Employee is “assigned to” a Department. That Department is “responsible for” an Employee. ... entity2 Using this formula, Employee and Department would be expressed like so: Each Employee must be assigned to one and only one Department. Each Department may be responsible for one or many...

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