hướng dẫn sử dụng mysql workbench

... nó cũng được sử dụng 1 cách đặc biệt. Để làm việc với NULL, chúng ta không sử dụng các toán tử so sánh thông thường như <, >, <>, =. Để hiểu rõ, xin thử như sau: mysql& gt; select ... Bạn mở tập tin pet.txt ra, sửa lại record bạn muốn sửa. Rồi đánh lệnh sau: mysql& gt; set autocommit=1; #dùng để tạo nhanh lại 1 bảng. mysql& gt; delete from pet; mysql& gt; load data infile ... f | 1989-05-13 | NULL | + + + + + + + Ngoài ra, mysql còn sử dụng "extended regular expresions" cho pattern matching. Khi sử dụng kiểu này, bạn thay LIKE và NOT LIKE thành REGEXP...

Ngày tải lên: 19/04/2014, 19:59

... 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 table mysqlshow Shows ... in a file. mysqlaccess Manages users. mysqladmin Enables you to manage the database server, including the creation and dele- tion of databases. mysqld The actual MySQL server process. mysqldump Dumps...

Ngày tải lên: 02/07/2014, 12:20

... 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. ... 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 ... database can be formatted by your program into a new HTML page to send back to the user. Summary MySQL is an SQL-based Relational Database Management System (RDMS). Relational databases are organized...

Ngày tải lên: 02/07/2014, 12:20

... /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...

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 ... Commands end with ; or \g. Your MySQL connection id is 3 to server version: 3.22.29 Type 'help' for help. mysql& gt; The mysql command above says to connect to the MySQL server on the local machine ... primary goals. Chapter 17, MySQL Data Types, provides a full reference of SQL types supported by MySQL. Table 4-1 is an abbreviated listing of the most common types. MySQL supports the UNSIGNED...

Ngày tải lên: 02/07/2014, 12:20

... 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 . . ... information. $ mysql mysql& gt; use test . . mysql& gt; insert into test (object_id, object_title) values (1, "test"); Query OK, 1 row affected (0.02 sec) mysql& gt; quit Bye $ mysqlbinlog ... 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...

Ngày tải lên: 02/07/2014, 12:20

... this approach is that MySQL has the overhead of parsing, optimizing and executing the same query multiple times. If you let MySQL retrieve all the rows at once, you let MySQL do what it is good ... 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...

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 should ... any files containing data used by MySQL must be inaccessible by a normal user. However, we cannot simply make all MySQL- related files forbidden. Most of the MySQL files, such as the executable...

Ngày tải lên: 02/07/2014, 12:20

... is an example SQL script for creating the example database in MySQL. Example 2-1: An Example Script for Creating the CD Database in MySQL CREATE TABLE CD (CD_ID INT NOT NULL, RECORD_LABEL_ID ... the “FOREIGN KEY” reference is not used in the script. This is because MySQL does not support FOREIGN KEY constraints. MySQL will allow you to embed them in your CREATE TABLE statements but ... up with a MySQL database where you can store data. How do you get there? Physical database design translates your logical data model into a set of SQL statements that define your MySQL database....

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 MySQL to-do list, ... in the later chapters of this section, MySQL exposes itself through a variety of APIs tailored to specific programming languages. Java applications access MySQL through JDBC; Python applications...

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 simpler ANSI ... case, we have a driver object created from the DBD MySQL module. Through the 'func' method on this object, we are able to call the MySQL- specific 'ListDBs' function and retrieve...

Ngày tải lên: 02/07/2014, 12:20

... the format you wish to use by setting MySQLdb.paramstyle. The above example is MySQLdb.paramstyle = "format". The "format" value is the default for MySQLdb when a tuple of parameters ... will be some instances, however, where you may need access to MySQL- specific functionality.MySQLdb is actually built on top of the MySQL C API, and it exposes that API to programs that wish to ... chapter, you will need to download and install the MySQLdb, the MySQL version of DB-API. You can find the module at http://dustman.net/andy/python/MySQLdb. Chapter 23, The Python DB-API in the reference...

Ngày tải lên: 02/07/2014, 12:20

... 2 mysql_ create_db() mysql_ data_seek() mysql_ drop_db() mysql_ eof() mysql_ error() mysql_ fetch_field() mysql_ fetch_lengths() mysql_ fetch_row() mysql_ field_count() mysql_ field_seek() mysql_ free_result() ... mysql_ list_processes() mysql_ list_tables() mysql_ num_fields() mysql_ num_rows() mysql_ query() mysql_ real_query() mysql_ reload() mysql_ select_db() mysql_ shutdown() mysql_ stat() mysql_ store_result() mysql_ use_result() ... mysql_ free_result() mysql_ get_client_info() mysql_ get_host_info() mysql_ get_proto_into() mysql_ get_server_info() mysql_ init() mysql_ insert_id() mysql_ list_dbs() mysql_ list_fields() mysql_ list_processes()...

Ngày tải lên: 02/07/2014, 12:20

... com.caucho.jdbc .mysql. Driver jdbc :mysql- caucho://HOST[:PORT]/DB GNU org.gjt.mm .mysql. Driver jdbc :mysql: //[HOST][:PORT]/ DB[?PROP1=VAL1][&PROP2=VAL2] twz twz1.jdbc .mysql. jdbc- MysqlDriver jdbc:z 1MySQL: //HOST[:PORT]/ DB[?PROP1=VAL1][&PROP2=VAL2] ... available for MySQL. Of course, you are also able to use any sort of ODBC bridge to talk to MySQL as well—but we do not recommend it under any circumstance for MySQL develop- ers. Of the three MySQL ... protocol for the Caucho MySQL driver, for example, is mysql- caucho while the GNU driver uses mysql. The subprotocol provides the implementation-specific connection data. All MySQL drivers require...

Ngày tải lên: 02/07/2014, 12:20

... three. This is equivalent to running the mysqladmin drop utility. As with running mysqladmin, you must be the administrative user for MySQL (usually root or mysql) to perform this state- DRAFT, 8/24/01 Copyright ... large SELECT query is encountered. If set to 1, MySQL will abort the query with an error if the query would probably take too long to compute. MySQL decides that a query will take too long it ... backslash followed by another character to indicate to MySQL that the second character has a meaning other than its normal meaning. Table 16-1 shows the MySQL escape sequences. Quotes can also be escaped...

Ngày tải lên: 02/07/2014, 12:20

Ngày tải lên: 02/07/2014, 12:20

Ngày tải lên: 02/07/2014, 12:20

Ngày tải lên: 02/07/2014, 12:20

Ngày tải lên: 02/07/2014, 12:20

Ngày tải lên: 02/07/2014, 12:20