merge multiple databases into one

Phplib is PHP's some extensions, using it we can easily do a variety of database operations, but if you want to use more than one database, it appears to be powerless, this article describes the expansion of the phplib, so that you have the fish and bear cake, You can use multiple databases while using Phplib, and you can also learn about object-oriented programming and how to extend the library's knowledge

There is a group of friends said the official example, but the English and internet is too poor ... Think for yourself.Recently developed projects, need to read some information from the external system, after the calculation into the local database, the external system directly provide the database to me. So a multi-database connection is needed locally.Project using ABP Framework development, unfamiliar can look hereTo start with, I already have a dbcontext in my project that inherits to Abpze

In our project, we may sometimes need to connect more than one database, how to implement it in CI?We have created two new databases locally, as follows:Modify the configuration file database.php file to the following format (readers modify the configuration of the corresponding parameters according to their own database):Create two files in the Applicaton/model directory: score.phpand students.phpTo modify the Welcome controller:To access the http://

/*methods of accessing different tables across multiple servers first create a linked server testt,* the RPC configuration of the linked server ' TESTT ' cannot be directly modified under MSSQL2008 to Ture, which can be modified by the following statements:*/ Use [Master]GOEXECMaster.dbo.sp_serveroption@server=N'Testt',@optname=N'RPC',@optvalue=N'true'GOEXECMaster.dbo.sp_serveroption@server=N'Testt',@optname=N'RPC out',@optvalue=N'true'GO--and then ac

Problems caused by duplicate server-id synchronization between multiple mysql databases bitsCN.com Today, after setting up a new SLAVE database server, we found that there were a large number of TIME_WAIT database connections between the MASTER and SLAVE servers:Tcp 0 0 19.2.33.156: 56247 19.424228: 3306 TIME_WAITTcp 0 0 19.2.33.156: 56241 19.424228: 3306 TIME_WAITTcp 0 0 19.2.33.156: 56150 19.424228: 3306

mysql_connect () function without parameters to establish a connection and use it. The query results are cached.In this example, because link_identifier is not specified, the last opened link, namely $ conn2, is used by default when the first SQL statement is executed, in fact, the first SQL statement should use $ conn1, which leads to an error. To connect to multiple mysql databases, you can use the follo

Disucz multi-instance database code invocation.Success stories based on Discuz 2.5Modify conf/config_global.php 123456789 New database configuration information $_config[' db ' [' 2 '] [' dbhost '] = ' 192.168.1.2 '; $_config[' db ' [' 2 '] [' dbuser '] = ' root '; $_config[' db ' [' 2 ' [' dbpw '] = ' 123 '; $_config[' db ' [' 2 '] [' dbcharset '] = ' utf8 '; $_config[' db ' [' 2 '] [' pconnect '] = ' 0 '; $_config[' db '] [' 2 ' [' dbname '] = ' op '; $_config[' db ' [' 2

Hibernate how to configure operations on multiple databasesQuestion:Reference:I'm working on a project that needs to access data from two database instances, and how to configure and process it in a hibernate implementation--------------------------------------------------------------------------------1. If a project is going to read data from two or more database instances, how to handle it.2. If there is only one database Oraa, establish oraA.hbm.xm

1. Configure the. env filedb_host_trailer=127.0.0.1db_port_trailer=3306Db_database_trailer=htms_trailerDb_username_trailer=rootDb_password_trailer=db_host_freight=127.0.0.1db_port_freight=3306Db_database_freight=hangli_saasDb_username_freight=rootdb_password_freight=2, Configuration config/database.php' Mysql_freight ' = [' driver ' = ' mysql ', ' host ' = ' env ' (' db_host_freight ', ' Localho St '), ' database ' = env (' db_database_freight ', ' Forge '), ' username ' = env (' Db_username_fre

config.phpreturn Array( //'Configuration Items' = 'Configuration Values' //Cache //' data_cache_type ' = ' Memcache ',//' memcache_host ' = ' tcp://192.168.0.227:11211 ',//' data_cache_time ' = ' 3600 ', ' Default_controller '=' Index ', // Default controller name ' Default_action '=' index ', // Default action Name //Database ConfigurationBeruiuser ' DB_CONFIG1 '=Array( ' Db_type '=' MySQL ', ' Db_user '=' Root ', ' Db_pwd '=' aisijkl81 ', ' Db_host '=' 192.168.0.111 ', ' Db_po

Through this software, create a SQL Server database, the previous database has been ORCL, that is, Sqlplus SYSTEM/ORCLAfterNAME---------ORCLThis is true, but after you create the new database, it looks like this:The PL/SQL developer now used can be two database ORCL, and SQL Server can be linkedWant to have the console go back to the link in the ORCL database from the SQL Server linkdid not expect to have a good luck today unexpectedly quickly successfully recovered, tortured n days of problems

Build users and GroupsGroupadd MySQLuseradd-g MySQL MySQLDownload Source:wget https://downloads.mariadb.org/interstitial/mariadb-10.1.10/source/mariadb-10.1.10.tar.gzTAR-XVF mariadb-10.1.10.tar.gz1. Compiling:CMake. -dcmake_install_prefix=/var/lib/mysql3377/-dmysql_datadir=/var/lib/mysql3377/data/-DSYSCONFDIR=/var/lib/ Mysql3377/etc-dwith_innobase_storage_engine=1-dwith_archive_storage_engine=1-dwith_blackhole_storage_engine=1- Dwith_readline=1-dwith_ssl=system-dwith_zlib=system-dwith_libwrap=0-

]) Sends a query to the active database on the server associated with the specified connection identifier. If link_identifier is not specified, the last opened connection is used. If no connection is enabled, this function will try to call the mysql_connect () function without parameters to establish a connection and use it. The query results are cached. In this example, because link_identifier is not specified, the last opened link, namely $ conn2, is used by default when the first SQL statem