Which of the following keywords is used to display non-repeated values in MySQL?

1. Unique
2. All
3. Order by
4. Distinct

The SQL statements always end with …………… .

1. ,
2. :
3. ;
4. "

Rajat wants to delete a primary key constraint from the table. Select an appropriate command to do so.

1. Create
2. Alter
3. Drop
4. Delete

Rajveer wants to rename column in display result for his query. Select the appropriate query for the same:

1. Select Ename, Salary*12 Annual Salary From Emp;
2. Select Ename, Salary*12 Rename "Annual Salary" From Emp;
3. Select Ename, Salary*12 Change "Annual Salary" From Emp;
4. Select Ename, Salary*12 as "Annual Salary" From Emp;