When do we use a HAVING clause?

Which of the following ways below are the correct way to get the current date?

User() fucntion returns the current users user name and ___________

On executing DELETE command, if you get an error "foreign key constraint" what does it imply?

Can DISTINCT command be used for more than one column?

What is a candidate key?

BLOB data type can have default column value.

Can I define multiple unique constraints on a table?

Which is the default order of sort in ORDER BY clause?

USE keyword is used to select a ___________