Tag: databases

Questions Related to databases

With SQL, how can you return the number of records in the "Persons" table?

  1. SELECT COLUMNS(*) FROM Persons ;

  2. SELECT COUNT() FROM Persons;

  3. SELECT COUNT(*) FROM Persons;

  4. SELECT COLUMNS() FROM Persons;


Correct Option: C
  1. SELECT * FROM Persons WHERE FirstName='Peter' AND LastName='Jackson' ;

  2. SELECT * FROM Persons WHERE FirstName LIKE 'Peter' AND LastName LIKE 'Jackson';

  3. SELECT FirstName='Peter', LastName='Jackson' FROM Persons

  4. SELECT FirstName LIKE 'Peter', LastName LIKE 'Jackson' FROM Persons


Correct Option: A
  1. SELECT * FROM Persons WHERE LastName>'Hansen' AND LastName

  2. SELECT * FROM Persons WHERE LastName BETWEEN 'Hansen' AND 'Pettersen' ;

  3. SELECT LastName>'Hansen' AND LastName

  4. SELECT LastName LIKE'%Hansen%' AND LastName LIKE '%Pettersen%' FROM Persons ;


Correct Option: B
  1. INSERT ('Jimmy', 'Jackson') INTO Persons ;

  2. INSERT VALUES ('Jimmy', 'Jackson') INTO Persons ;

  3. INSERT INTO Persons VALUES ('Jimmy', 'Jackson') ;

  4. INSERT VALUES ('Jimmy', 'Jackson') INTO Table Persons ;


Correct Option: C
  1. INSERT INTO Persons ('Olsen') INTO LastName ;

  2. INSERT INTO Persons (LastName) VALUES ('Olsen');

  3. INSERT ('Olsen') INTO Persons (LastName) ;

  4. INSERT INTO Table Persons (LastName) VALUES ('Olsen');


Correct Option: B
  1. SELECT Persons.FirstName ;

  2. EXTRACT FirstName FROM Persons ;

  3. SELECT FirstName FROM Persons;

  4. EXTRACT Persons.FirstName


Correct Option: C
  1. SELECT DIFFERENT

  2. SELECT DISTINCT

  3. SELECT UNIQUE

  4. All of the above


Correct Option: B
  1. Structured Query Language

  2. Strong Question Language

  3. Structured Question Language

  4. None of the Above


Correct Option: A