To ensure that the user AMY can execute all operations against the SALES relation, you can use the following SQL statement sequence:

D. GRANT ALL PRIVILEGES ON SALES TO AMY

Explanation:

The GRANT statement is used to grant privileges to a user in a database system. In this case, the goal is to grant all privileges on the SALES relation to the user AMY.

The correct syntax for the GRANT statement is:

GRANT [privileges] ON [relation] TO [user]

In this case, we want to grant all privileges on the SALES relation to the user AMY. Therefore, the correct statement is:

GRANT ALL PRIVILEGES ON SALES TO AMY

Option D is the correct answer because it matches the correct syntax and grants all privileges on the SALES relation to the user AMY.

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To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) PreparedStatement - This option is correct. The Connection object in JDBC can create instances of PreparedStatement. PreparedStatement is used to execute parameterized SQL queries and provides better performance and security compared to Statement.

Option B) CallableStatement - This option is correct. The Connection object in JDBC can create instances of CallableStatement. CallableStatement is used to execute stored procedures in the database.

Option C) Statement - This option is correct. The Connection object in JDBC can create instances of Statement. Statement is used to execute simple SQL queries.

Option D) SQLStatement - This option is incorrect. SQLStatement is not a valid class or interface in JDBC.

Based on the explanations above, the correct answer is E) AB&C. The Connection object in JDBC can create instances of PreparedStatement, CallableStatement, and Statement.

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