Which of the following SQL commands can use a foreign key constraint? (check any that apply)

Which of the following is not a DDL statement?

If AND and OR are used after WHERE clause ...

Suppose a table CUSTOMERS has the following records: 

+---+--------+----------+

| ID | CUSTOMER| INCOME |

+----+---------+---------+

| 1 | Roman | 150000 |

| 2 | Andrew | 200000 |

| 3 | Christi | 240000 |

| 4 | Ivan | 240000 |

| 5 | John | 240000 |

| 6 | Ann | 240000 |

+----+---------+---------+`

Which of the following statements will select the customers with income more than 200000? (check any that apply)

Which one of the following is the correct way to delete a column from a table?

Consider two tables A and B having only one column each and having these values:

A = [0, 1, 2, 3, 4, 5]

B = [5, 6, 7, 8, 9, 10]

The number of records in result of UNION operator on these tables will be?

What visual technique is commonly used to format subqueries?

What of the following is an operator for nonequality?

What function returns the highest value in a column?

What function counts the number of rows in a column?

Which character is used to retrieve all columns of data?