What is the result, when NULL is compared with NULL?
Answers were Sorted based on User's Feedback
Answer / kmbkrishnan
if we check a Null value with another Null value as equal,
the result will be false.
Is This Answer Correct ? | 47 Yes | 8 No |
Answer / anil kumar abbireddy
NOT EQUAL AND AGAIN ANSWER IS NULL
Is This Answer Correct ? | 14 Yes | 2 No |
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
Is This Answer Correct ? | 13 Yes | 1 No |
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.
Is This Answer Correct ? | 15 Yes | 6 No |
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'
Is This Answer Correct ? | 8 Yes | 1 No |
Answer / a.jyothsna
One null value is not equal to another null value.
Is This Answer Correct ? | 7 Yes | 1 No |
Answer / kirankumar.vangeti
Null is neither equal to null nor it is not equal to null.
Any comparison to null is evaluated to null.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / brahma
Null means unknown values, but do not compare both null
values
Is This Answer Correct ? | 2 Yes | 0 No |
what is a control file ? : Sql dba
What are actual parameters and formal parameters?
how many tables will create when we create table, what are they? : Sql dba
How many clustered indexes can you have?
what is the difference between the query and corelated query
8 Answers HSBC, IBM, TCS, Xenosoft,
in procedure how to return a value
What is a native sql query?
Can dml statements be used in pl/sql?
how view used for security purposes?
Which join is like an inner join?
What are wait events. Describe the wait event tables.
what is a trigger? : Sql dba