Database Management Systems
In Oracle, the LN() function returns the natural logarithm of its argument, where the argument is greater than 0.
In other words, it returns the base-e logarithm of its argument.
The number e, also known as Euler’s number, is a mathematical constant approximately equal to 2.71828.
In Oracle, the ATAN2() function returns the arctangent (inverse tangent) of its two arguments.
In Oracle, the ATAN() function returns the arctangent (inverse tangent) of its argument.
In other words, it returns the value whose tangent is the argument.
MariaDB has quite a number of functions that return the day from a date. It all depends on how you want to do it, and what you mean by “day”.
MariaDB needs to know whether you want the day name, the day of the week number, the day of the month, day of year, etc.
Below are 8 functions that enable you to return the day from a date in MariaDB, in its various forms.
In Oracle, the BITAND() function returns a bitwise AND of its two arguments.
SQLcl and SQL*Plus are command line interfaces for working with Oracle Database.
By default, they return an empty string whenever null occurs as a result of a SQL SELECT statement.
However, you can use SET NULL to specify a different string to be returned. Here I specified that the string null should be returned.
Starting with SQLcl version 21.2, we can now configure SQLcl for syntax highlighting.
That means that the code you write in SQLcl can be color coded, based on the syntax highlighting rules you apply.
When using SQLcl (Oracle’s command line interface), you can create a login.sql file, and have it run each time you run SQLcl.
This allows you to have commands executed each time you run SQLcl. For example, you can specify your formatting preferences in the login.sql file, set up aliases, etc.
Here I show you how to create a login.sql file and how to make it run each time you run SQLcl.
In Oracle, the ASIN() function returns the arcsine (inverse sine) of its argument.
In other words, it returns the value whose sine is the argument.