PostgreSQL_CE
PGCES-02 · Question #45
PGCES-02 Question #45: Real Exam Question with Answer & Explanation
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Question
The table "custom" is defined below. The "id" column and "introducer" column are of INTEGER type, and the "email" column is of TEXT type. id | email | introducer ----+-----------------+------------ 2 | [email protected] | 1 3 | [email protected] | 2 4 | [email protected] | 2 Three SQL statements were executed in the following order: UPDATE custom SET email = '' FROM custom c WHERE custom.introducer = c.id; UPDATE custom SET introducer = NULL WHERE introducer NOT IN (SELECT id FROM custom); DELETE FROM custom WHERE id = 2 OR introducer = 2; PostgreSQL CE PGCES-02 Exam Select the number of rows in the "custom" table after the execution.
Options
- A0 rows
- B1 row
- C2 rows
- D3 rows
- E4 rows
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