I have only used db links to get access to remote db so far. Now I have to find a way to use JDBC to connect to remote db and get data. Can someone guide me what all things would I need to ask the remote db admin in order to setup a jdbc connection, and once I have the connection, how do I query the database using java stored procedure, just like I am querying it over remote db right now with db link?
You've described a fairly complicated problem, but haven't given any information about your database or operating system. Are you connecting to a SQL Server database? MySQL? Are you running on Linux? Windows?
First, you'll need a driver. That's going to depend on the database, operating system and versions thereof that you're using. For example, here is the Microsoft ODBC Driver for SQL Server (Oops, looks like it's currently unavailable.)
Second, you need to set up Oracle Heterogenous Services. That's fairly complicated and not something I can answer here. You might start with the Database Gateway for ODBC User's Guide.
Oracle does have gateways for various other databases, but they're licensed additionally from the database itself.
Related
currently, we are using oracle 8i and we are working to decommisson it.
I need to find out which all other databases are connecting to our database using db link.
Please note, I am not looking for the connection from our database to others database. I already got that information using all_Db_links.
If you audit connections to the database or look at the listener log, that will tell you the machines that are connecting to the database and the application that is connecting (that information is coming from the client so it could be spoofed but I'm assuming no one is actively trying to hide information from you). That should allow you to determine which connections are coming via database links. That may not tell you which database on the particular server is connecting if there are multiple databases on the same server using the same Oracle Home. But it should narrow it down to a relatively small number of databases that you can manually check.
I am developing java applications which connect to Oracle databases. Application loads some amount of data on startup. Because of slow connection to TEST environment, applications start up take some time.
I am looking if there is some proxy/cache tool, which would locally store results for every query. So it could load result from memory if query was already called, instead of calling DB again. This could save a lot of time.
I guess ProxySQL does something similar but it is targeted for MySQL. Is there something for Oracle DB ?
Check out the Oracle Client Result Cache. It works with the JDBC OCI driver.
https://docs.oracle.com/database/121/TGDBA/tune_result_cache.htm#TGDBA626
I am new to Oracle database in general, but I'm attempting to get Oracle's SQL Developer running on a workstation that has pre-configured System DSNs created for an OracleRDB database. I've confirmed the ODBC connections are working because I can use MS Access to connect and link to the tables. The "test" options within ODBC also succeed. Now I am trying to get a similar connection created using SQL Developer so I can see the column types and write queries in a more useful editor.
Here's what I have available when examining the ODBC connection properties:
Now I'm trying to create a duplicate connection in SQL Developer, but I'm at a loss for why things don't work. I first tried using the default SQL Developer installation, but couldn't get things working. Then I discovered there's an OracleRDB extension available, so I installed that, but I keep getting this error when attempting to use similar values:
As I stated, these ODBC connections were pre-configured on the workstation I'm using, so I don't know anything more than what is provided by the Oracle ODBC driver window.
Is there something obvious I'm not seeing or doing to replicate this connection in SQL Developer? Or perhaps something else I can do to debug this to learn more?
UPDATE
On the advice of one answer I'm trying to make the connection with JDBC, but having a hard time understanding what I'm doing wrong. Here's another screenshot with the connection parameters I have available, but with the server and database names changed:
With these values (the port came from my tnsnames.ora file), if I try to make a JDBC connection I keep getting the following error from SQL Developer:
One final attempt I did was to use the proper values in the Oracle RDB tab, and when I use them and click 'test' the Testing Connection dialog just spins and never seems to return:
So I apologize for the long post here, but I'm struggling because there's just something I am really not understanding about how this all works. I appreciate everyone who took the time to read this question.
Oracle SQL Developer is a Java Application. You'll need to get the JDBC Driver for RDB.
Once you have that, in the SQL Developer preferences, find the Third Party JDBC section, and then use that to add an entry and point to the JAR for what you just installed.
Step by step instructions here.
Working connection string for RDB Thin Driver:
RDB_DB_CONN_STR = "jdbc:rdbThin://node.myplace.com:1707/";
where node.myplace.com is the name of the OpenVMS node hosting the RDB Thin Driver, 1707 is the port number assigned to the RDB Thin Driver.
I want to know if is there a way of change the driver used by Microsoft Access to extract data (only use select like querys) from Oracle 9i data base.
The Access to Oracle connection is made using an external data source (linked table) and usually the default Access driver is ODBC for ORACLE, but I want to change that and use a JDBC driver for ORACLE instead.
Thanks in advance.
The Access to Oracle connection is made using an external data source (linked table) and usually the default Access driver is ODBC for ORACLE, but I want to change that and use a JDBC driver for ORACLE instead.
I'm fairly certain that this is impossible. Access linked tables connect via Jet/ACE (for links to another Access database), or ODBC (for all other data sources). JDBC is not an option.
I want to know that mirth can connect with other database like(cache,sybase,informix).
I am getting no way to connect all above database using mirth
because In Mcsm(mirth connect server manager) there is only few database option like(postgres,durby,oracle,mysql).
so is there any alternate way to use url of (cache,informaix database) in mcsm.
please help me any help is highly apprecialble.
derby
postgres
mysql
oracle
Sql server2000
sql server
-These are the various different RDBMS system that Mirth can support at this moment in the latest version 2.2.2.6388
Having said that, it means that the mirthdb the database that mirth uses for its integration purpose can be configured/installed on any of the above RDBMS systems, most of the times its either postgre or mysql.
Other than this, there is no other means of connecting to informix (even though I would love to see that happen), that depends on Mirth corp.
If you have a JDBC driver (.jar file) for the other database(s), you could try these steps:
Add the .jar file to the $MIRTH_HOME/custom-lib directory
Add/Change a driver entry to the file $MIRTH_HOME/conf/dbdrivers.xml
I'm not sure if that will let you choose other databases in MCSM or only allows you to choose them in Mirth channels (Database Reader, Database Writer, etc), but it's worth a try. I am unable to test it right now.
See http://www.mirthcorp.com/community/wiki/display/mirth/Server+Configuration