Export and Import Database link in Oracle 18c

In this post, we will export and import the database link with data pump in Oracle 18c. In next post, we will demonstrate to prevent the passwords of database link using keystores. First, we created the user for testing purpose.

Now, we connected to the new user and created one dummy table with some […]

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Creating Schema-Only Accounts in Oracle 18c

In this post, we will create a schema-only user or we can say that user with no authentication, this feature introduced in Oracle 18c. Sometimes developers want to create a user which contain data only but not allowed to log in.

Now creating the user without password.

Create a dummy table for testing. […]

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ORA-01144: File size (4194304 blocks) exceeds maximum of 4194303 blocks

You may get this error while creating a tablespace in your environment.

Oracle has some boundaries to set datafile maximum size based on the db_block_size parameter. db_block_size maximum allowed size for datafile 2k 8GB 4K 16GB 8K 32GB 16K 64GB 32K 128GB The formula to calculate the max size is db_block_size * 4194303. If […]

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Physical Standby Database: Redo Apply Architecture

In the previous article, we have seen basics about the architecture of Oracle Dataguard. Oracle Dataguard Architecture Oracle Data Guard works on physical standby and logical standby sites. Physical Standby: When primary database generates redo entries, those redo are transferred to standby database and then redo is applied to standby database. Logical Standby: When primary […]

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Upgrade Grid Infrastructure to 18.2 by applying RU

Database 18c Patch As of the Release date (17-Apr-2018), the only Oracle Database 18 software that is available is 18.1.0 for on-premise Exadata. Therefore, the following patches for Oracle Database 18 are only for on-premise Exadata systems that are running Oracle Database 18.1.0. More Info: Database 18 Proactive Patch Information (Doc ID 2369376.1) OPatch Utility Information You must […]

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Patching (or Updating) home and database to 18.2 from base release by applying RU

Database 18c Patch As of the Release date (17-Apr-2018), the only Oracle Database 18 software that is available is 18.1.0 for on-premise Exadata. Therefore, the following patches for Oracle Database 18 are only for on-premise Exadata systems that are running Oracle Database 18.1.0. More Info: Database 18 Proactive Patch Information (Doc ID 2369376.1) OPatch Utility Information […]

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CDB Fleets in Oracle 18c

A lead CDB is the central location for monitoring and managing the CDBs in the fleet. A CDB fleet provides the database infrastructure for scalability and centralized management of many CDBs. Designate one CDB in the fleet to be the lead CDB by setting its LEAD_CDB database property to TRUE. The other CDBs in the […]

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SET ROWLIMIT in Oracle 18c

Sets a limit for the number of rows to display for a query. By default, ROWLIMIT is OFF. SET ROWLIMIT {n | OFF} n can be any number between 1 and 2,000,000,000. An error is displayed when the value that is entered is outside this range. OFF displays all the rows in the output. Example To set […]

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Duplicating a PDB to an Existing CDB in Oracle 18c

Use the DUPLICATE command to duplicate a PDB to an existing CDB. To duplicate a PDB to an existing CDB: Ensure that the required prerequisites are met. Review the limitations of duplicating a PDB to an existing CDB Create the directories that store the duplicate database files on the destination CDB Establish Oracle net connectivity […]

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createPluggableDatabase with DBCA in Oracle 18c

In this post, we can use createPluggableDatabase command creates a pluggable database (PDB) in a multitenant container database (CDB) with DBCA in Oracle 18c.

Let’s connect to the database and check the PDB is created or not.

In the next post, we can delete the PDB with DBCA in Oracle 18c. Stay tuned for more […]

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