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In this article, we will install apache cassandra on Centos 7 in a Standalone structure. Now let’s start installing our Cassandra NoSQL database on Centos …

What is real time apply in dataguard? If media recovery is started with the following command after installing Data Guard in versions prior to Oracle …

This article contains information about oracle string functions such as length, substr, concat, trim in Oracle database management system. What is Oracle string function? Oracle …

In Oracle databases, when the downgrade operation or “migrate schema” operation is done through adrci, when using the adrci, ORA-48318 error is received when the …

We will check data guard status in SQL Plus in this article in many ways. Check 1: Check for LAG from V$DATAGUARD_STATS View. [crayon-684c4804cf0e4875061065/] [crayon-684c4804cf0e8134607642/] …

You can find all standby databases for a primary database in data guard by using one of the queries below. [crayon-684c4804cf604755730913/] or [crayon-684c4804cf607687999393/] Standby -> …

Check Data Guard Recovery Mode You can find database_mode, recovery mode and protection mode of your Data Guard as follows. [crayon-684c4804cf853264595214/] Data Guard Recovery Modes …

This article contains scripts about checking Standby redo logs. You can use the below queries to check standby redo logs in Oracle. [crayon-684c4804cf9c6405260708/] or [crayon-684c4804cf9ca903494762/]

This article contains information about revoke command usage in PostgreSQL. You may want to revoke permissions of users. In this case, you can use the …

Conversion operations in datetime data types often cause poor performance but they are always the ones that are overlooked. We will examine the Cast and …