What will happen if the following SQL command is executed, if the age column has a CHECK constraint enforcing positive values? INSERT INTO Users (username, age, country_code) VALUES (‘alice756’, -1 , ‘US’);
Which SQL command will retrieve all users whose age is great…
Which SQL command will retrieve all users whose age is greater than 25 and who belong to the ‘US’?
Why is the DECIMAL data type recommended for storing money o…
Why is the DECIMAL data type recommended for storing money or prices in SQL?
Which of the following is an advantage of MySQL being open-s…
Which of the following is an advantage of MySQL being open-source?
An entity can participate in multiple relationships in an ER…
An entity can participate in multiple relationships in an ER diagram.
Which of the following operations can violate referential in…
Which of the following operations can violate referential integrity?
What is referential integrity in a relational database?
What is referential integrity in a relational database?
What is the role of NULL values in relational databases?
What is the role of NULL values in relational databases?
Which of the following SQL clauses is used to limit the numb…
Which of the following SQL clauses is used to limit the number of rows returned?
In MySQL, which of the following statements about NULL valu…
In MySQL, which of the following statements about NULL values is true?