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SQL (Structured Query Language) MCQ Quiz (Multiple Choice Questions And Answers)

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16. Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.

So, What the below SQL statement will return:

SELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM EMPLOYEE);

 

  • 10
  • 9
  • 5
  • 0
View Answer

17. The SQL statement - SELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL; Prints

  • gh
  • 23
  • bc
  • ab
View Answer

18. The SQL statement - SELECT ROUND(45.926, -1) FROM DUAL;

  • is illegal
  • prints garbage
  • prints 045.926
  • prints 50
View Answer

19. Which of the following must be enclosed in double-quotes?

  • Dates
  • Column Alias
  • String
  • All of the mentioned
View Answer

20. Which of the following command makes the updates performed by the transaction permanent in the database?

  • ROLLBACK
  • COMMIT
  • TRUNCATE
  • DELETE
View Answer

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