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 estim...

Ngày tải lên: 02/07/2014, 12:20

... assume RPM files MySQL- 3.23.40-1.i3 86. rpm, MySQL- client-3.23.40-1.i3 86. rpm, MySQL- devel-3.23.40- 1.i3 86. rpm., MySQL- bench-3.23.40-1.i3 86. rpm and MySQL- shared- 3.23.40-1.i3 86. rpm have been downloaded ... –i /tmp /MySQL- 3.23.40-1.i3 86. rpm $ rpm –i /tmp /MySQL- client-3.23.40-1.i3 86. rpm $ rpm –i /tmp /MySQL- devel-3.23.40-1.i3 86. rpm $ rpm –i /tmp /MySQL- bench-3.23....

Ngày tải lên: 02/07/2014, 12:20

... recently, MySQL had no support for transactions. In other words, when you executed a SQL statement under old versions of MySQL, it took effect immedi- ately. This behavior is still the default for MySQL. ... to this question. Under MySQL, the right answer currently is to put the processing in the client due to the lack of stored procedure support in MySQL. Stored procedures are on the...

Ngày tải lên: 02/07/2014, 12:20

... and support 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. mysqlhotcopy Performs a hot backup of a MySQL database. mysqlimport Imports data in different file formats into a MySQL ta...

Ngày tải lên: 02/07/2014, 12:20

... Associates, Inc. 3 ISBN Title Author 0-4 46- 67424-9 L.A. Confidential James Ellroy 0-201-54239-X An Introduction to Database Systems C.J. Date 0-8 768 5-0 86- 7 Post Office Charles Bukowski 0-941423-38-7 ... 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 t...

Ngày tải lên: 02/07/2014, 12:20

... 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 ... of their signed counterparts. An unsigned TINYINT MySQL s single byte numeric type—has a range of 0 to 255 instead of the -127 to 127 range of its signed counterpart. MySQL provides mor...

Ngày tải lên: 02/07/2014, 12:20

... 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 odin-bin.index, ... port = 33 06 socket = /var/lib /mysql/ mysql.sock provide two more examples of this. Next we encounter # These options go to the mysqld server [mysqld] which specifi...

Ngày tải lên: 02/07/2014, 12:20

... 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 sho...

Ngày tải lên: 02/07/2014, 12:20

... 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 Employe...

Ngày tải lên: 02/07/2014, 12:20

... database servers. The database-specific functionality for MySQL is placed in a utility class called simply &apos ;mysql& apos;. package BM: :mysql; use strict; use warnings; sub new { my ... returned as ANSI SQL standard types. While these are often the same as the MySQL data types, many of the more unusual MySQL data types (such as NUMERIC, and TEXT) are represented as sim...

Ngày tải lên: 02/07/2014, 12:20