different databases

Laravel Association between models of different databases, Laravel Model Association Suppose the relationship between Modela and Modelb is Belongsto. If you belong to a database connection So Public function A () { return$this->belongsto ("Modela") } If two models belong to a different database So Public function A () { $instancenew Modela;

The configuration template of the hibernate. cfg. xml file and the configuration parameters of different databases, hibernate. cfg. xml (1) configuration template of the hibernate. cfg. xml file (2) The above knowledge introduces the Oracle configuration method, but there is no relevant configuration for the url driver configured in many other databases; Below

Problem descriptionIn SQL * Plus, how does one implement data replication between different tables, whether local or remote?Problem AnalysisThe Copy command in SQL * Plus allows you to copy data between a remote database, a local database, or an Oracle database and a non-Oracle database. Its performance is the same as that of import/export.Basic command format of copy:Copy {from source_database | to destination_database}{Append | create | insert | rep

This article mainly introduces the code instances for connecting to different databases using adodb in PHP programs. the specific usage example uses the switch statement to write a summary support. For more information, see adodb. inc. the php file needs to download an adodb file, put it in the corresponding location, and then include it in php. Connect to oracle Database Connect to the PostgreSQL datab

: This article mainly introduces the PHP program that connects to two different MYSQL databases. if you are interested in the PHP Tutorial, please refer to it. Echo "Connecting as MySQL \ N "; $ Connection1 = mysql_connect ('localhost', 'mysql', '') or die ($ php_errormsg ); Echo "connection1 is $ connection1 \ N "; Echo "Selecting test for mysql user \ N "; Mysql_select_db ('test', $ connection1) or @ di

Tags: des using on data as database SQL MySQL OracleUsage of Select top in different databases:1. Oracle DatabaseSELECT * from TABLE1 WHERE rownum2. Infomix DatabaseSELECT First N * from TABLE13. DB2 DatabaseSELECT * Row_number () over (ORDER by COL1 DESC) as ROWNUM WHERE rownumOrSELECT COLUMN from TABLE FETCH first N ROWS only4. SQL Server DatabaseSELECT TOP N * from TABLE15. Sybase databaseSET ROWCOUNT NG

not try again, should also be able, write finish again.The second option is to use Database.connection to set the connection string, as follows: Public Mydbcontext (string connection) { = getsqlitestring (connection); }Here does not call the method inside the base, for Mysqlite,getsqlitestring as follows: Private string Getsqlitestring (string Connect) { return"Data source=" + connect; }This will enable the operation of the ConnectionSt

Implementation methods of Database SQL recursive queries in different databases, SQL Recursion This article describes how to implement SQL recursive queries in different databases. For more information, see the following. For example, the table structure data is as follows: Table: Tree ID Name ParentId 1 Level 1 0 2 Le

This article mainly introduces the code instances for connecting to different databases using adodb in PHP programs. the specific usage example uses the switch statement to write a summary support. For more information, see adodb. inc. the php file needs to download an adodb file, put it in the corresponding location, and then include it in php. Connect to oracle Database Connect to the PostgreSQL datab

Tags: password generation address ROM join server data exec rowData operations between different server databases --Create a linked serverexec sp_addlinkedserver ' itsv ', ' ', ' SQLOLEDB ', ' Remote server name or IP address 'exec sp_addlinkedsrvlogin ' itsv ', ' false ', NULL, ' username ', ' password ' --query ExampleSELECT * from ITSV. Database name. dbo. Table name --import ExampleSELECT * into table f

Tags: DDL removal sample Import create log linked ROM OpsData operations between different server databases--Create a linked serverexec sp_addlinkedserver ' itsv ', ' ', ' SQLOLEDB ', ' Remote server name or IP address 'exec sp_addlinkedsrvlogin ' itsv ', ' false ', NULL, ' username ', ' password '--query ExampleSELECT * from ITSV. Database name. dbo. Table name--import ExampleSELECT * into table from ITSV.

1. Data import and export between SQL Server databases(1). Use Select to export data The most widely used SQL Server is to export data through the SELECT INTO statement, which has two features: an empty table based on the field followed by the Select and the table name into which it follows (if the select is *, The structure of the empty table is the same as the structure of the table in which it is referred to, and the data isolated from the select i

1. Direct database conversions for different database types Navicat is a good database management software, you can use it for different types of database direct conversion, the following links in detail how to use Navicat to convert the mssql2000 database into a MySQL database. 2. Data conversion between different structural

Agent service and set it to start automatically, otherwise your job will not be executed by the Setup method: My Computer--control Panel--management tool--service--right-click SQL serveragent--Property--Startup Type--select "Auto Start"--OK. --3. Method of implementing synchronous processing 2, timed synchronization--creating the following synchronization stored procedure in SRV1 create proc p_process as--updating modified data Update B set Name=i.name,telphon E=i.telphone from SRV2. Library na

Tags: name splay DDR Sele user establishes time instance fromOracle cross-Library query table data createtime--2018 April 14 11:56:54 Author:marydon1. Usage Scenarios When you need to access the data in library B from a library, you need to connect the two libraries together. 2. Code implementation First step: Create a database connection Template Create Database Link, just a name . to by Password ' ( DESCRIPTION = (address_list = ( ADDRESS = (PROTOCOL =

ado| Access | data | Database Microsoft Corporation provides a unified data access interface, ActiveX, ADO. But in practical application programming, access to different databases, such as access, SQL Server, or VFP, there will be some "subtle" differences, there is often such a case, the ADO object access to a database of programs are debugging passed, but with the same program access to other

The forum has a lot of discussion about deadlock, in theory, R.ramakrishnan's "Database Management Systems" also has a very incisive exposition. As far as actual development is concerned, different database environments have different processing methods, different architectures can lead to different results, and the fo

The configuration template of the hibernate. cfg. xml file and the configuration parameters of different databases (1) configuration template of the hibernate. cfg. xml file Com. mysql. jdbc. Driver Root Root Jdbc: mysql: // 127.0.0.1: 3306/hibernatetest Org. hibernate. dialect. MySQLDialect True

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

testing to see if synchronization is possibleCREATE TABLE Db_test_primary.dbo.db_test_primary3 (ID int)GoInsert Db_test_primary.dbo.db_test_primary3 Select Top ID from dbo.sysobjectsWAITFOR DELAY ' 00:01:30 'Go--Check the standby database to see if synchronization is successfulSELECT * FROM Db_test_second.dbo.db_test_primary3drop table Db_test_primary.dbo.db_test_primary3--Finally delete the test environmentDrop Database Msdb.dbo.sp_delete_job@job_name =n ' data synchronization 'MySQL synchroni