hướng dẫn sử dụng mysql query browser

Hướng dẫn sử dụng MySQL

... 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...

17
1,269
1

Hướng dẫn sử dụng MySQL part 1 ppt

Danh mục: Cơ sở dữ liệu

... 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

Danh mục: Cơ sở dữ liệu

... 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 ... distributed responsibility easy). You put a form on one web page that the user fills in with a query or data to submit. When the user submits the form to your server, the server runs a program...

Hướng dẫn sử dụng MySQL part 3 docx

Danh mục: Cơ sở dữ liệu

... /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

Danh mục: Cơ sở dữ liệu

... 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 ... completely useless query returns a result set with a single rowcontaining a single column with the value of 1. A more useful version of this query might be something like: mysql& gt; SELECT DATABASE();+...

Hướng dẫn sử dụng MySQL part 5 pps

Danh mục: Cơ sở dữ liệu

... 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 ... 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

Danh mục: Cơ sở dữ liệu

... 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 ... of rows that MySQL thinks it will have to examine from this table in order to execute the query. Extra Extra lists more information about how a query is resolved. Distinct After MySQL has found...

Hướng dẫn sử dụng MySQL part 7 pps

Danh mục: Cơ sở dữ liệu

... 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 ... privileges, the query is executed. If the privilege is still not suffecient and the query is one that only effects the database, but not any tables (such as a DROP database query) , then the query is...

Hướng dẫn sử dụng MySQL part 8 potx

Danh mục: Cơ sở dữ liệu

... 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....

Hướng dẫn sử dụng MySQL part 9 docx

Danh mục: Cơ sở dữ liệu

... recently, MySQL had no support for transactions. In other words, when youexecuted a SQL statement under old versions of MySQL, it took effect immedi-ately. This behavior is still the default for MySQL. ... tothis question.Under MySQL, the right answer currently is to put the processing in the client dueto the lack of stored procedure support in MySQL. Stored procedures are on the MySQL to-do list, ... in Figure 9-1. This architecture describes fourcomponents: the Web browser, the Web server, the Perl CGI engine, and the MySQL database.Architecture is the starting point for the design of...

Hướng dẫn sử dụng MySQL part 10 potx

Danh mục: Cơ sở dữ liệu

... handle will cause the query to be sent to the database server and executed. The result of executing a query depends on the type of query. If the query is a non-SELECT query that returns no data ... number of rows that were affected by the query. That is, for an insert query (that inserts one row of data), the execute query will return '1' if the query was successful. For SELECT queries, ... to us from the client browser. We then use that database connection to execute a SQL query that retrieves all of the data from a table. The first step in executing a SQL query is to prepare...

Hướng dẫn sử dụng MySQL part 11 ppt

Danh mục: Cơ sở dữ liệu

... %s)', ('BLUE', 'BL'));Example 11-1. A Simple Query import MySQLdb;connection = None;try: connection = MySQLdb.connect(host="carthage", user="user", ... theformat you wish to use by setting MySQLdb.paramstyle. The above example isMySQLdb.paramstyle = "format". The "format" value is the default forMySQLdb when a tuple of parameters ... will be some instances, however, where you mayneed access to MySQL- specific functionality.MySQLdb is actually built on top ofthe MySQL C API, and it exposes that API to programs that wish to...

Hướng dẫn sử dụng MySQL part 12 pot

Danh mục: Cơ sở dữ liệu

... 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() ... 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_ 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()...

Hướng dẫn sử dụng MySQL part 13 pdf

Danh mục: Cơ sở dữ liệu

... com.caucho.jdbc .mysql. Driverjdbc :mysql- caucho://HOST[:PORT]/DBGNU org.gjt.mm .mysql. Driver jdbc :mysql: //[HOST][:PORT]/DB[?PROP1=VAL1][&PROP2=VAL2] twz twz1.jdbc .mysql. jdbc-MysqlDriverjdbc:z 1MySQL: //HOST[:PORT]/DB[?PROP1=VAL1][&PROP2=VAL2] ... available for MySQL. Ofcourse, you are also able to use any sort of ODBC bridge to talk to MySQL aswell—but we do not recommend it under any circumstance for MySQL develop-ers.Of the three MySQL ... protocol for theCaucho 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...

Hướng dẫn sử dụng MySQL part 14 doc

Danh mục: Cơ sở dữ liệu

... when a large SELECT query is encountered. If set to1, MySQL will abort the query with an error if the query would probably taketoo long to compute. MySQL decides that a query will take too ... three. This is equivalent torunning the mysqladmin drop utility. As with running mysqladmin, you must bethe administrative user for MySQL (usually root or mysql) to perform this state-DRAFT, 8/24/01Copyright ... backslash followed by another character to indicateto MySQL that the second character has a meaning other than its normalmeaning. Table 16-1 shows the MySQL escape sequences. Quotes can also beescaped...