ORACLE

What is a Multitenant Database? As of version 12.1, you can design your databases as a multitenant database (CDB). It consists of a container database, …

When the Exadata database is upgraded to version 12.2, “gc cr request” and “gc buffer busy acquire” wait events occur in many operations in the …

During the index rebuild process, if some of the blocks belonging to the index are on a corrupted datafile, you receive the error “ORA-08102: index …

Due to an unknown situation in Oracle 11g databases, “ORA-00600: internal error code, arguments: [qcsprfro_tree: jrs present]” error is received during refresh of some materialized …

With the DBMS_REDEFINITION package in the Oracle database, it is possible to modify the structure of the tables online. We can convert a non-partitioned table …

Being a DBA we must know the difference between the SQL profile and the baselines. To start with we know that optimizer uses the information …

What is Oratab Oracle creates a record for each Oracle RAC database in the oratab configuration file. The oratab file is created by the root.sh …

If there is a difference with the db_name parameter when opening the Oracle database, you receive an error as follows. “ORA-00205: error in identifying control …

ORA_ROWSCN returns the SCN information for the last modified date of the row for each row in a table. You can use this pseudo-column to …

Static Data Dictionary Views These are new static data dictionary views which are introduce in Oracle Database Release 19c. ALL_TRIGGERS_AE DBA_TRIGGERS_AE USER_TRIGGERS_AE DBA_AUTO_INDEX_CONFIG DBA_AUTO_STAT_EXECUTIONS DBA_PDB_SNAPSHOTFILE …