Oracle

What is NTP? An abbreviation for “ NTP Network Time Protocol”. NTP is a protocol used to synchronize the clocks of computers on packet-switched networks with …

Linux Operating Systems will automatically see how to start and stop the database. Together with the database, we will enable Listener Service and Enterprise …

Error: During an RMAN backup, we may receive the following errors. ORA-00245: check file backup operation failed, we receive a warning. RMAN-08132: WARNING: …

Error: When clients attempt to connect to the database, they can not connect with the error “ORA-12502: TNS: listener received no CONNECT_DATA from the client”. …

What is Hadoop? Hadoop is an open-source library written in Java that enables us to process in parallel on multiple machines with large data sets. Hadoop stores …

The Argument list too long error is usually a lot of files when trying to delete the file with the rm -rf command. Solving the problem is simple. You can …

How to Install Oracle Java 12 on Linux? Run the following commands on the terminal to install Oracle Java. sudo add-apt-repository ppa:linuxuprising/java sudo …

No matter which hard disk brand you have, it is simply a matter of your time before you’ll need data recuperation. Whether it is a result of mechanical failure …

There are three levels of data modeling. They are conceptual, logical, and physical. This section will explain the difference between the three, the order with …

Tables are the basic structure where data is stored in the database. Given that in most cases, there is no way for the database vendor to know ahead of time …

Views can be considered as virtual tables. Generally speaking, a table has a set of definition that sets the structure of the table, and physically stores the …

Indexes help us retrieve data from tables quicker. Let’s use an example to illustrate this point: Say we are interested in reading about how to grow peppers in …