Oracle连接字符串

由 dawei 3 月 30, 2021 没有评论 #oracle #字符串 #连接

原贴地址：https://www.connectionstrings.com/oracle/

.NET Framework Data Provider for Oracle

Standard

Data Source=MyOracleDB;Integrated Security=yes;
This one works only with Oracle 8i release 3 or later
- Oracle
Specifying username and password

User Id=myUsername;Password=myPassword; Integrated Security=no;
This one works only with Oracle 8i release 3 or later
- Oracle
Omiting tnsnames.ora

This is another type of Oracle connection string that doesn't rely on you to have a DSN for the connection. You create a connection string based on the format used in the tnsnames.ora file without the need to actually have one of these files on the client pc.

SERVER=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MyHost)(PORT=MyPort))(CONNECT_DATA=(SERVICE_NAME=MyOracleSID))); uid=pwd=myPassword;
- Oracle
Omiting tnsnames.ora Alternative

Some reported problems with the one above and Visual Studio. Use the next one if you've encountered problems.

User Id=Oracle




 Using Connection Pooling
 The connection pooling service will create a new pool if it can't find any existing pool that exactly match the new connections connection string properties. If there is a matching pool a connection will be recycled from that pool.
 myOracleDB;Min Pool Size=10;
 Connection Lifetime=120;Connection Timeout=60;Incr Pool Size=5;Decr Pool Size=2; 

 The first connection opened creates the connection pool. The service initially creates the number of connections defined by the Min Pool Size parameter.
 The Incr Pool Size attribute defines the number of new connections to be created by the connection pooling service when more connections are needed.
 When a connection is closed,the connection pooling service determines whether the connection lifetime has exceeded the value of the Connection Lifetime attribute. If so,the connection is closed; otherwise,the connection goes back to the connection pool.
 The connection pooling service closes unused connections every 3 minutes. The Decr Pool Size attribute specifies the maximum number of connections that can be closed every 3 minutes.

Oracle



 Windows Authentication
 /; 


Oracle



 Privileged Connection with SYSDBA privileges
 SYS;DBA Privilege=SYSDBA; 


Oracle



 Privileged Connection with SYSOPER privileges
 SYSOPER; 


Oracle



 Utilizing the Password Expiration functionality
 First open a connection with a connection string. When the connection is opened,an error is raised because the password have expired. Catch the error and execute the OpenWithNewPassword command supplying the new password.
 Data Source=myOracleDB;User Id=myUsername;Password=myPassword;
 
 oConn.OpenWithNewPassword(sTheNewPassword); 


Oracle



 Proxy Authentication
 
 Proxy User Id=pUserId;Proxy Password=pPassword; 


Oracle


 Problems connecting?


   Get answer in the

  Oracle Q & A forum 
 dotConnect for Oracle

User ID=Host=ora;Pooling=true;0; Max Pool Size=100;Connection Lifetime=0;
- Oracle

Oracle Data Provider for .NET / ODP.NET

Using TNS

TORCL;Oracle




 Using integrated security
 SSPI; 


Oracle



 Using ODP.NET without tnsnames.ora
 (DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=MyHost)(PORT=MyPort)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=MyOracleSID)));myPassword; 

 Article:"Oracle Data Provider for .NET"by Rama Mohan

Oracle



 Using the Easy Connect Naming Method (aka EZ Connect)
 The easy connect naming method enables clients to connect to a database without any configuration.
 username/password@//myserver:1521/my.service.com; 

 Port 1521 is used if no port number is specified in the connection string.
 Make sure that EZCONNECT is enabled in the sqlnet.ora file. NAMES.DIRECTORY_PATH= (TNSNAMES,EZCONNECT)
 '//' in data source is optional and is there to enable URL style hostname values

Oracle



 Easy Connect Naming Method to connect to an Instance
 This one does not specify a service or a port.
 username/password@myserver//instancename; 


Oracle



 Easy Connect Naming Method to connect to a dedicated server instance
 This one does not specify a service or a port.
 username/password@myserver/myservice:dedicated/instancename; 

 Other server options: SHARED,POOLED (to use instead of DEDICATED). Dedicated is the default.

Oracle



 Specifying Pooling parameters
 By default,connection pooling is enabled. This one controls the pooling mechanisms. The connection pooling service creates connection pools by using the ConnectionString property to uniquely identify a pool.
 myOracle;Oracle




 Restricting Pool size
 Use this one if you want to restrict the size of the pool.
 Max Pool Size=40;
 Connection Timeout=60; 

 The Max Pool Size attribute sets the maximum number of connections for the connection pool. If a new connection is requested,but no connections are available and the limit for Max Pool Size has been reached the connection pooling service waits for the time defined by the Connection Timeout attribute. If the Connection Timeout time has been reached,and there are still no connections available in the pool,the connection pooling service raises an exception indicating that the request has timed-out.

Oracle



 Disable Pooling
 False; 


Oracle



 Using Windows user authentication
 Oracle can open a connection using Windows user login credentials to authenticate database users.
 /; 

 If the Password attribute is provided,it is ignored.
 Operating System Authentication is not supported in a .NET stored procedure.

Oracle



 Privileged Connections
 Oracle allows database administrators to connect to Oracle Database with either SYSDBA or SYSOPER privileges.
 SYSDBA; 

 SYSOPER is also valid for the DBA Privilege attribute.

Oracle



 Runtime Connection Load Balancing
 Optimizes connection pooling for RAC database by balancing work requests across RAC instances.
 Load Balancing=True; 

 This feature can only be used against a RAC database and only if pooling is enabled (default).

Oracle



 Oracle in OraHome92


 Driver={Oracle in OraHome92};Dbq=myTNSServiceName;Uid=Pwd=Oracle



 Oracle in XEClient


 Standard
 Oracle XE (or "Oracle Database 10g Express Edition") is a simple version that's free to distribute.
 (Oracle in XEClient);dbq=111.21.31.99:1521/XE;
 Pwd=Oracle




 Oracle in OraClient11g_home1


 {Oracle in OraClient11g_home1};Oracle



 Server SID
 Server=serverSID;Oracle




 Both Server and Dbq
 ODBC;[server SID];UID=[userid];
 PWD=[password];DBQ=[server SID]; 

 Some feedback on using both Dbq and Server keywords to make this work.

Oracle



 Oracle Provider for OLE DB


 Standard Security
 Provider=OraOLEDB.Oracle;
 Password=Oracle




 Trusted Connection
 This one specifies OS authentication to be used when connecting to an Oracle database.
 OSAuthent=1; 


Oracle



 Oracle XE,VB6 ADO
 localhost:1521/XE;Database=myDataBase;Oracle




 
 
 Initial Catalog=Oracle




 TNS-less connection string
 
 Data Source=(DESCRIPTION=(CID=GTU_APP)(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=myHost)(PORT=myPort)))(CONNECT_DATA=(SID=MyOracleSID)(SERVER=DEDICATED)));Oracle




 Controling rowset cache mechanism
 Specifies the type of caching used by the provider to store rowset data. OraOLEDB provides two caching mechanisms; File and Memory.
 CacheType=File; 

 Memory is the default value. All the rowset data is stored in-memory which provides better performance at the expense of higher memory utilization.
 File = All the rowset data is stored on disk. This caching mechanism limits the memory consumption at the expense of performance.

Oracle



 Controling the fetchsize
 This one specifies the number of rows the provider will fetch at a time (fetch array).
 FetchSize=200; 

 The FetchSize value must be set appropriately depending on the data size and the response time of the network. If the value is set too high,this could result in more wait time during the execution of the query. If the value is set too low,this could result in many more round trips to the database. Valid values are 1 to 429,496,296. The default is 100.

Oracle



 Controling the chunksize
 This one specifies the size,in bytes,of the data in LONG and LONG RAW columns fetched and stored in the provider cache.
 ChunkSize=200; 

 Providing a high value for this attribute improves performance,but requires more memory to store the data in the rowset. Valid values are 1 to 65535. The default is 100.

Oracle



 Using with Microsofts OLE DB .NET Data Provider
 The Microsoft OLE DB .NET Data Provider can utilize OraOLEDB as the OLE DB Provider for accessing Oracle. However this must be enabled in the connection string.
 OLEDB.NET=True; 

 The OLEDB.NET connection string attribute must not be used in ADO applications.

Oracle



 Using OraOLEDB Custom Properties with Microsofts OLE DB .NET Data Provider
 The SPPrmsLOB and NDatatype properties can only be set as connection string attributes when OraOLEDB is used by OLE DB .NET Data Provider.
 True;SPPrmsLOB=False;NDatatype=
 SPPrmsLOB=False; 

 Using ADO,these properties would have been set as a property on the command. This is not possible if using the Microsofts OLE DB .NET Data Provider. So the properties are specified in the connection string instead.
 PLSQLRSet: If the stored procedure,provided by the consumer,returns a rowset,PLSQLRSet must be set to TRUE (enabled).
 NDatatype: This property allows the consumers to specify whether any of the parameters bound to the command are of Oracle's N datatypes (NCHAR,NVARCHAR or NCLOB). This information is required by OraOLEDB to detect and bind the parameters appropriately. This property should not be set for commands executing SELECT statements. However,this property must be set for all other SQLs such as INSERT,UPDATE,and DELETE.
 SPPrmsLOB: This property allows the consumer to specify whether one or more of the parameters bound to the stored procedures are of Oracle's LOB datatype (CLOB,BLOB,or NCLOB). OraOLEDB requires this property to be set to TRUE,in order to fetch the parameter list of the stored procedure prior to execution. The use of this property limits the processing overhead to stored procedures having one or more LOB datatype parameters.

Oracle



 Using distributed transactions
 This one specifies sessions to enlist in distributed transactions. This is the default behaviour.
 DistribTX=1; 

 Valid values are 0 (disabled) and 1 (enabled).

Oracle



 Microsoft OLE DB Provider for Oracle


 Standard security
 This connection string uses a provider from Microsoft.
 msdaora;Oracle




 Trusted connection
 Persist Security Info=Yes; 


Oracle



 .NET Framework Data Provider for OLE DB


 Use an OLE DB provider from .NET
 any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; 

 See the respective OLEDB provider's connection strings options. The .net OleDbConnection will just pass on the connection string to the specified OLEDB provider. Read morehere.


 Use 'Oracle Provider for OLE DB' from .NET
 True; 

 Note! The keyword "OLEDB.NET" must be set to "True" for the OraOLEDB.Oracle provider to function with the .NET Framework Data Provider for OLE DB.

Oracle



 Microsoft ODBC Driver for Oracle


 Old version
 {Microsoft ODBC Driver for Oracle};ConnectString=OracleServer.world;
 Uid=Oracle




 Microsoft ODBC for Oracle


 New version
 {Microsoft ODBC for Oracle};myServerAddress;Oracle




 Connect directly
 No TSN nor DSN required.
 
 Server=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=199.199.199.199)(PORT=1523))(CONNECT_DATA=(SID=dbName)));Oracle




 Without TSN.ora alternative
 
 CONNECTSTRING=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=server)(PORT=7001))(CONNECT_DATA=(SERVICE_NAME=myDb)));Oracle




 .NET Framework Data Provider for ODBC


 Use an ODBC driver from .NET
 {any odbc driver's name};OdbcKey1=OdbcKey2=someValue; 

 See the respective ODBC driver's connection strings options. The .net OdbcConnection will just pass on the connection string to the specified ODBC driver. Read morehere.


 MSDataShape


 MSDataShape (Oracle)
 MSDataShape;Data Provider=MSDAORA;orac;Oracle




                    
                    
	
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Oracle连接字符串

.NET Framework Data Provider for Oracle

Standard

Specifying username and password

Omiting tnsnames.ora

Omiting tnsnames.ora Alternative

Using Connection Pooling

Windows Authentication

Privileged Connection with SYSDBA privileges

Privileged Connection with SYSOPER privileges

Utilizing the Password Expiration functionality

Proxy Authentication

dotConnect for Oracle

User ID=Host=ora;Pooling=true;0; Max Pool Size=100;Connection Lifetime=0; Oracle

Oracle Data Provider for .NET / ODP.NET

Using TNS

Using integrated security

Using ODP.NET without tnsnames.ora

Using the Easy Connect Naming Method (aka EZ Connect)

Easy Connect Naming Method to connect to an Instance

Easy Connect Naming Method to connect to a dedicated server instance

Specifying Pooling parameters

Restricting Pool size

Disable Pooling

Using Windows user authentication

Privileged Connections

Runtime Connection Load Balancing

Oracle in OraHome92

Driver={Oracle in OraHome92};Dbq=myTNSServiceName;Uid=Pwd=Oracle

Oracle in XEClient

Standard

Oracle in OraClient11g_home1

{Oracle in OraClient11g_home1};Oracle

Server SID

Both Server and Dbq

Oracle Provider for OLE DB

Standard Security

Trusted Connection

Oracle XE,VB6 ADO

TNS-less connection string

Controling rowset cache mechanism

Controling the fetchsize

Controling the chunksize

Using with Microsofts OLE DB .NET Data Provider

Using OraOLEDB Custom Properties with Microsofts OLE DB .NET Data Provider

Using distributed transactions

Microsoft OLE DB Provider for Oracle

Standard security

Trusted connection

.NET Framework Data Provider for OLE DB

Use an OLE DB provider from .NET

Use 'Oracle Provider for OLE DB' from .NET

Microsoft ODBC Driver for Oracle

Old version

Microsoft ODBC for Oracle

New version

Connect directly

Without TSN.ora alternative

.NET Framework Data Provider for ODBC

Use an ODBC driver from .NET

MSDataShape

MSDataShape (Oracle)

由 dawei

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Oracle数据加密方法分析

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【独家】服务器安全：员工培训和教育的重要性

`User ID=Host=ora;Pooling=true;0; Max Pool Size=100;Connection Lifetime=0;`

Oracle