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what is the out put of below queries?
a. select * from Emp where null = null;
b. select * from Emp where 1=1;

Question Posted / jawahar

Answers were Sorted based on User's Feedback



what is the out put of below queries? a. select * from Emp where null = null; b. select * ..

Answer / poonam

First Query : will return all columns name without any data.
Second Query :will display all the records which are available in the table.bez Select* from emp where 1=1; the condition is true.

Is This Answer Correct ?    0 Yes 0 No

what is the out put of below queries? a. select * from Emp where null = null; b. select * ..

Answer / nitin yadav(nitin.yadav.india@

u can not compare two nulls

null means nothing.so
ANS 1:no row
ANS 2:All row (because of 1=1 is always true for all rows)

Is This Answer Correct ?    1 Yes 2 No

what is the out put of below queries? a. select * from Emp where null = null; b. select * ..

Answer / rohit

in first case it would response and it will show error and
in second case it will show object belonging to first row
and column

Is This Answer Correct ?    4 Yes 29 No

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