Multiple choice technology databases

The || is is an example of what function SELECT last_name || ', ' || first_name || ' ' || middle_name FROM employees;

  1. Incantination

  2. Integration

  3. Continuation

  4. Concatenation

  5. Pipeline

  6. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To solve this question, the user needs to know the SQL syntax and the concept of concatenation.

The given SQL statement is using the || operator to join or concatenate multiple columns together.

Now, let's go through each option and explain why it is right or wrong:

A. Incantination: This option is incorrect as "Incantation" is not a valid SQL function or concept.

B. Integration: This option is incorrect as "Integration" is not a valid SQL function or concept.

C. Continuation: This option is incorrect as "Continuation" is not a valid SQL function or concept.

D. Concatenation: This option is correct. The || operator is used to concatenate or combine two or more strings in SQL, resulting in a single string that contains all the characters from the original strings.

E. Pipeline: This option is incorrect as "Pipeline" is not a valid SQL function or concept.

F. None of the above: This option is incorrect as option D, "Concatenation", is the correct answer.

Therefore, the answer is: D. Concatenation

AI explanation

The || operator in Oracle SQL is the string concatenation operator — it joins (concatenates) two or more strings/columns end-to-end, exactly as shown: last_name, a comma-space literal, first_name, a space, and middle_name are glued into one output string. "Incantination" and "Continuation" are not real SQL terms. "Integration" and "Pipeline" are unrelated database concepts (data integration, pipelined functions) that don't describe what || does. "Concatenation" is the only term that correctly names string-joining behavior.

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