Change the Character Set & Collation of a table
To change the Character Set and Collation of a field of a table you have to use this query: if the table contains data, you have to update that data as follow:
Rebuild and Reorganize all indexes within a database
If you want to REBUILD and REORGANIZE all your indexes in a database, you have to use this query: Rebuild: Reorganize:
Backup/Restore Progress
To see the progress of Backup or Restore process you can use this query:
Database Startup Error: Fatal NI connect error 12547
If you see Fatal NI connect error 12547 error in alert log file of a Database in the middle of startup, and the database process couldn’t find DB PARAMETER FILE and CONTROL FILE, you have to check permissions,owner and group of these files: The permission of these files have to be 6751. The group of […]
IMPDP Errors: ORA-02374, ORA-12899
If the Character set of source and destination database are not equal, you will see below errors in the impdp log file: to solve this error, you have to restore the structure of tables first after that, you have to create a table and fill it with information about columns with have CHAR or VARCHAR […]