IBM
A2090-560 · Question #133
When creating a table, you can specify a column constraint for each individual column of either "NULL" or "NOT NULL". When column values are later evaluated within a query statement, which of these…
The correct answer is D. 0 is not equal to null, the empty string ( '' ) is not equal to null. See the full explanation below for the reasoning.
Question
When creating a table, you can specify a column constraint for each individual column of either "NULL" or "NOT NULL". When column values are later evaluated within a query statement, which of these is true?
Options
- A0 is equal to null, the empty string ( '' ) is equal to null.
- B0 is equal to null, the empty string ( '' ) is not equal to null.
- C0 is not equal to null, the empty string ( '' ) is equal to null.
- D0 is not equal to null, the empty string ( '' ) is not equal to null.
How the community answered
(25 responses)- A4% (1)
- B12% (3)
- C8% (2)
- D76% (19)
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