I created DB link and when I try to use It I am getting the following error.
Error : ORA-12514: TNS:listener does not currently know of service requested in connect descriptor. I have database entry in the tnsnames.ora on server and as well as on client.
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Subquery in Oracle:
Sub queries are one of advance queries in oracle.
Types of advance queries:
• Sub Queries
• Hierarchical Queries
• Set Operators
Sub queries are know as the query called from another query or another subquery. It can …
Have you ever had to make fundamental changes to a table in Oracle, but haven't been able to get any downtime? I'm talking things like:
* Dropping columns
* Shrinking allocated space
* Removing chained blocks and restoring the PCTFREE
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.