1.

What does comparing a known value with NULL result into?(a) zero(b) a positive value(c) a negative value(d) null

Answer» Correct answer is (d) null

For explanation: In MySQL, NULL is not comparable to other known values. It will result in a NULL when compared to any value. The following statement would result in four NULLs: ‘SELECT NULL = 0, NULL < 0, NULL <> 0, NULL > 0’.


Discussion

No Comment Found