Is it possible to connect to Postgres DB with "PL/SQL Developer" like we can connect Oracle DB ?? Thanks.
No. You need to connect to a database with the network protocol for that database. Oracle PL/SQL Developer is written by Oracle, and therefore only supports Oracle databases.
Related
From https://learn.microsoft.com/en-us/sql/tools/sqlcmd-utility
sqlcmd uses ODBC to execute Transact-SQL batches.
I wonder what APIs are used by the command line clients of mysql, postgresql, and Oracle sql. ODBC, JDBC, or ...?
Thanks.
Each of the databases you mention use their own protocol for client-server communication.
For MySQL and PostgreSQL these are documented, while as far as I know Oracle's protocol is not published.
Always when I want to use a programme that is using a MySQL database, it forces me to install a MySQL connector or mysql-connector-java.jar.
Why do I need a MySQL connector and how does it work??
JDBC is a library used by your Java programs to access relational databases. You can use it to access Oracle, Informix, Microsoft SQL Server, PostgreSQL, DB2, and other makes of database server, as well as MySQL.
The MySQL connector is a library for, well, connecting JDBC to the MySQL database. If your program were using Oracle, you would use the Oracle connector instead.
This is necessary because each make of database server has its own specific protocol for transporting requests to, and results from, the server to application programs.
We are using ERP application that stores data to ORACLE database and also we have web applications that uses the same ERP database. We are getting the performance issues when ERP and another application use the same database.
We are planning to do mirroring of oracle database into mysql database. So that mysql db is used for web applications and oracle db is used for ERP. So we could say these new database (mysql) are mirror of ERP database.
What is the best way for mirroring this condition?
You could use Golden Gate for this kind op replication. See GoldenGate for Oracle to MySQL
A VERY smart alternative - and very price worthy - would be dbvisit replicate The Dedicated Dbvisit Server : Replicating Data from Oracle to MySQL and SQL Server
Can any one suggest me if there is a way to connect Oracle from MySQL please.
At the moment, no.
MySQL supports FEDERATED storage engine which is similar to Linked Servers / Remote Servers used by another systems, but as for the moment, it only supports remote MySQL servers.
There is a way to connect MySQL from Oracle, though, using Oracle Database Gateway.
I need to migrate some tables in mysql db to oracle db.
Do you now any tutorial to learn about this migration?
Thanks
You can connect to the MySQL instance from Oracle using Oracle's database link - this link details making the connection from Oracle to MySQL.
Bearing in mind that the MySQL account you use to create the connection will determine access to MySQL data, once the link is created you can work within Oracle to select data from the MySQL tables into the Oracle tables without a need for scripts and such.
Find an ETL tool like Informatica or SSIS to help you. Oracle's Migration Workbench might be the perfect choice, since you're already using Oracle.