Answer / kmbkrishnan

if we check a Null value with another Null value as equal,
the result will be false.

Answer / anil kumar abbireddy

NOT EQUAL AND AGAIN ANSWER IS NULL

Answer / affan shemle

It is absolutely perfect to compare NULL with NULL. It
yields the result NULL. For those who are saying the result
is FALSE they are taking the answer from IF THEN ELSE. In
all the above answers supported by IF Statement there is a
catch. The result of IF is a Boolean. A Boolean can hold
TRUE, FALSE or NULL. So when you compare NULL vs NULL as a
condition of IF THEN, it returns NULL so the controller goes
to ELSE skipping the IF. Makes sense???
/
AFFAN SHEMLE

Answer / pavan_1981

i dont know how u can compare a null value with another
null value.i dont find any operator for doing that.

Answer / sant

In oracle the below eg will help you to clear this:

DECLARE
D INTEGER :=NULL;
E INTEGER :=NULL;
BEGIN
IF (D = E) THEN
dbms_output.put_line('PASS);
ELSE
dbms_output.put_line('FAIL');
END IF;
END;

It will alwayz return FAIL.

Answer / talent pool

NULL Is An Unknown Value
So We Couldn't Compare it With Other One.This Is Pure
Correct Answer.

declare @d int
Set @d =null
declare @r int
Set @r=null
if @d=@r
Print 'Hi'
Else
Print 'Summa Vilayadatha'

Answer / a.jyothsna

One null value is not equal to another null value.

Answer / guest

The answer is NULL vs NULL = FALSE

Answer / kirankumar.vangeti

Null is neither equal to null nor it is not equal to null.
Any comparison to null is evaluated to null.

Answer / brahma

Null means unknown values, but do not compare both null
values

How to Execute a Package in PL/SQL.?

0 Answers   MCN Solutions,

How would you hide a table in sql. ie the table can be only visible to its maker?

3 Answers  

How many aggregate functions are available there in sql?

0 Answers  

i hv 30 rows with date.ex:1month hav 4 weeks i want 1st day of the every week.write the qry for that.example jan has 4 weeks i need 1st dd for evry wk

1 Answers   Aspire,

what is the difference between $message and $$message? : Sql dba

0 Answers  

How you can copy a file to file content and file to pl/sql table in advance pl/sql?

0 Answers  

explain commit and rollback in mysql : sql dba

0 Answers  

What is union?

0 Answers  

1.when will you use week refcursor and when will you use strong ref cursor ? 2.what is the use of sql trace..how do you use it ? 3.can you please send all the sql plus commands...like set line 6000....

1 Answers   Satyam,

How do you explain an index?

0 Answers  

define data blocks ? : Sql dba

0 Answers  

What is a cursor for loop ?

4 Answers