1.Explain the meaning of the keyword EXISTS
2.Explain how any and all relate to EXISTS and NOT EXISTS
3.Write a query that will display the names of any customers who are interested in all artists.
4.Describe the correct steps involved in changin the table name, ensuring that problem will not arise in the database.
5.Show a SQL statement to add an integer column C1 to a table T2. Assume that C1 is NULL.