Is null in case statement Oracle?
Accordingly, is null in case statement?
The CASE statement goes through conditions and returns a value when the first condition is met (like an IF-THEN-ELSE statement). If no conditions are true, it returns the value in the ELSE clause. If there is no ELSE part and no conditions are true, it returns NULL.
Secondly, iS NULL condition in Oracle? The Oracle IS NOT NULL condition is used to test for a NOT NULL value. You can use the Oracle IS NOT NULL condition in either a SQL statement or in a block of PLSQL code.
Moreover, is null in select statement Oracle?
Introduction to the Oracle IS NULL operator NULL is special in the sense that it is not a value like a number, character string, or datetime, therefore, you cannot compare it with any other values like zero (0) or an empty string (”). The IS NULL operator returns true if the expression or column is NULL .
Is null equal to null in Oracle?
Because null represents a lack of data, a null cannot be equal or unequal to any value or to another null. However, Oracle considers two nulls to be equal when evaluating a DECODE function. Oracle also considers two nulls to be equal if they appear in compound keys.