linking access databases

of a transaction is only two states, that is, commit or terminate. During a transaction execution, if a step fails, the data changes involved in the transaction scope need to be restored to a specific point set before the transaction execution, which is called a rollback . For example, if a user wants to insert 10 records into a table, and during execution, an error occurs while inserting to 5th, the transaction rollback operation is performed and the 4 records that have been inserted are remo

create a global dblink, you must use the SYSTM or SYS user to add public before database:create public database link....For example, create Test_dblink in TESTDB2 to manipulate the TESTDB1 database in the host 192.168.1.254:create database link tset_dblinkconnect to username identified by password1using ‘(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.254)(PORT = 1521)))(CONNECT_DATA =(SERVICE_NAME = testdb1)))‘;3. Using Dblink:Query the data in another database, other

) (port = port number)) (connect_data = (service_name = Connection database service name) ))';If you create a global dblink, you must use the SYSTM or SYS user to add public before database:Create public database ....For example, create Test_dblink in TESTDB2 to manipulate the TESTDB1 database in the host 192.168.1.254:Create DATABASE link Tset_dblinkconnect to username identified by password1using ' (DESCRIPTION = (address_list = (ADDRESS = (PROTOCOL = TCP) (HOST = 192.168.1

Objective:Sometimes we want to access the local area network SQL Server server, such as test environment database in the company intranet, back home or at the customer site to connect to the database in the intranetThe first step: if you can connect to the local area network database 192.168.150.129, remote also can connect itThe second step: Add a TCP port in the intranet pangolin, the IP of the local IP, port 1433, map to the external network port t

Label:Control Panel-management tool-ODBC data source (64-bit)-System dns-Add (name "Test", Server Fill ".") Description Optional) The database accessed here is Adventuerworks The data source is configured so you can test it, and here's the Java code: Public static void Main (String args[]) { Connection con;//link java.sql.Statement sql;//statement ResultSet RS ;//Query result try { class.forname ("Sun.jdbc.odbc.JdbcOdbcDriver");//Build Bridge Connection } catch (ClassNotF

Non-SQL Server databases such as IBM DB2, which are accessed in Visual Studio.NET beta version 1, typically use the ODBC method of Ado.net, while in Beta 2 the database is accessed using OLE DB methods instead. The connection string in BETA1 is primarily required to declare the ODBC DNS name of the database, but the string of OLE DB connections in Beta 2 is more complex and the classes used are not the same. Because the database such as DB2 is used w

(initctrls); CWinApp::InitInstance (); AfxEnableControlContainer (); Create Shell Manager in case the dialog box includes//no matter what Shell tree view control or Shell List view control. CShellManager *pshellmanager = new CShellManager; Standard initialization//assuming that these features are not used and that you want to reduce//Finally the size of the executable file, you should remove the following//unwanted specific initialization routines//change the registry entry used to sto

Tags: position 64-bit system body exception 64-bit ORACL. dll ACL RACThe client installs the 32-bit Ora client in the Win7 64-bit system, and the NET install post-connection database raises badimagefomatexception.Installing a 64-bit Ora client on a client is also unrealistic and may affect the normal use of other applications, and speed is not allowed.Oci.dll is divided into 32 and 64. Then search the Internet for 64 oci.dll. Place it in the program execution file location. Back to normal.NET us

I. Configuration database1.SQL ServerSqlserver.driverclassname=com.microsoft.sqlserver.jdbc.sqlserverdriversqlserver.url=jdbc:sqlserver://localhost : 1433;database=test;integratedsecurity=falsesqlserver.username=sasqlserver.password=123456Note: Database=test, which represents the name of the database accessed2.oracleJdbc.driverclassname=oracle.jdbc.driver.oracledriverjdbc.url=jdbc:oracle:thin: @localhost: 1521/ orcljdbc.username=testjdbc.password=123456Note: orcl,oracle User instantiation Name3.