liferay database

Relational Database V. S. Non-relational database, relational database v. sThe most important feature of a relational database is transaction consistency: The read and write operations of a traditional relational database are transactions and ACID-based, this feature allows

Database paging query statement database query and database paging query statement Let's take a look at the paging SQL of a single SQL statement. Method 1: Applicable to SQL Server 2000/2005 Select top page size * FROM table1 WHERE id not in (select top page size * (page-1) id FROM table1 order by id) order by id Method 2: Applicable to SQL Server 2000/2005 Selec

I. Migration and concurrent use Generally, the Enterprise Library is built on. NET 2.0, and later versions of the Enterprise Library do not need to be changed.Code. You do not need to update the reference to the newProgramYou do not need to specify the correct version of the Assembly in the configuration file. The Enterprise Library of this version 4.1 can be installed with the Enterprise Library of the previous version. You can deploy the application that uses the new version and the old

1. What is an enterprise database? The Enterprise Library contains a series of applicationsProgramModule and core architecture. These highly reusable components aim to help developers solve some common enterprise development problems. The enterprise database also provides highly configurable features, making it easier for us to manage repetitive tasks. For example, we know cross-cutting concerns that occu

Tags: 5.4 analysis file set CIN nod DDR host byte tableMySQL database failed to start recovery MySQL database crash recover MySQL database recovery Customer Name confidentiality data type MySQL 5.5 innodb data capacity MB Failure type server power outages cause MySQL to fail to boot. The customer tries InnoDB crash recovery from parameter 1-6 invalid, innodb:

"Operating System Error 5 (Access denied)" is displayed during SQL SERVER database backup ). The backup database is being terminated abnormally ." Wrong solution: database backup. backup "Operating System Error 5 (Access denied) occurs when the SQL SERVER database is backed up ). The backup

PHP a random code, according to the ID inserted into the database, and then determine if the database already exists in the random code and then randomly inserted into the database Reply content: PHP a random code, according to the ID inserted into the database, and then determine if the

When you use mysqlce to export database scripts, an exception occurs if the database contains Chinese content. Now, you can use mysqldump.exe to directly export the database script as follows: Step one Run cmd to open the ConsoleProgram Step two redirects the current directory to the mysqldump.exe directory Enter the cd c: \ Program Files \ mysql \ MySQL Ser

To do a program today, select the option from the CheckBoxList into the database, and then to read the data from the database and also to correspond to the corresponding options up, stored in the database is very simple, with a circular deposit on the line, in order to read the convenience, I added a comma after each, the code is as follows: Save in

I'm just learning to use PDO to manipulate the database, but, after connecting to the database, use Query () to execute the SELECT query statement, but always error: No database selected, code and error information as follows: the error is: Fatal error:uncaught exception ' pdoexception ' with message ' sqlstate[3d000]: Invalid Catalog No

[Email protected]:/home/xiachengjiao# vi/webwall/mysql/my.cnf(see parameters in config file)[Email protected]:/webwall/mysql/bin#./mysql-u root-s/var/mysql1.sock-pEnter Password:enter password:********ERROR 2002 (HY000): Can ' t connect to local MySQL serverthrough socket '/var/mysql1.sock ' (2)Prompt to not connect to the databaseFind causes and resolvePs-a |grep MySQL view database process is not turned on[Email protected]:/webwall/mysql/bin$sudo./s

Information A 1, stop the database server, the database MDF files and LDF files copy backup a copy 2, start the database server, delete the suspect database 3, only with the backup of the database MDF file attached to the database