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PostgreSQL_CE

PGCES-02 · Question #88

Select three SQL statements which return NULL.

The correct answer is A. SELECT 0 = NULL; B. SELECTNULL != NULL; D. SELECT NULL. PostgreSQL CE PGCES-02 Exam

Data Management and SQL

Question

Select three SQL statements which return NULL.

Options

  • ASELECT 0 = NULL;
  • BSELECTNULL != NULL;
  • CSELECT NULL IS NULL;
  • DSELECT NULL;
  • ESELECT 'null'::TEXT;

How the community answered

(57 responses)
  • A
    74% (42)
  • C
    11% (6)
  • E
    16% (9)

Explanation

PostgreSQL CE PGCES-02 Exam

Topics

#SQL NULL#NULL comparison#NULL behavior#PostgreSQL

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