PostgreSQL_CE
PGCES-02 · Question #94
A table named "sample" is defined as below. Select two statements which will generate a constraint error. CREATE TABLE sample ( i INTEGER PRIMARY KEY, j INTEGER, CHECK ( i > 0 AND j < 0 ) );
The correct answer is A. INSERT INTO sample VALUES (1, 0); D. INSERT INTO sample VALUES (NULL, -4). See the full explanation below for the reasoning.
Question
A table named "sample" is defined as below. Select two statements which will generate a constraint error. CREATE TABLE sample ( i INTEGER PRIMARY KEY, j INTEGER, CHECK ( i > 0 AND j < 0 ) );
Options
- AINSERT INTO sample VALUES (1, 0);
- BINSERT INTO sample VALUES (2, -2);
- CINSERT INTO sample VALUES (3, NULL);
- DINSERT INTO sample VALUES (NULL, -4);
- EINSERT INTO sample VALUES (5, -5);
How the community answered
(22 responses)- A77% (17)
- B5% (1)
- C5% (1)
- E14% (3)
Community Discussion
No community discussion yet for this question.