What is true about non-equijoin statement performance?

• A.The between condition always performs less well than using the >= and <= conditions.
• B.The Oracle join syntax performs better than the SQL: 1999 compliant ANSI join syntax.
• C.The join syntax used makes no difference to performance.
• D.The between condition always performs better than using the >= and <= conditions.
• E.Table aliases can improve performance.

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When does a transaction complete? (Choose all that apply.)

• A.When a PL/SQL anonymous block is executed
• B.When a DELETE statement is executed
• C.When a data definition language statement is executed
• D.When a TRUNCATE statement is executed after the pending transaction
• E.When a ROLLBACK command is executed

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In the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:

What would be the outcome?

• A.Abigail IS
• B.Abigail PA
• C.An error message
• D.Abigail Pa

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View the Exhibit and examine the structure of the PRODUCTS table. (Choose the best answer.)

You must display the category with the maximum number of items.
You issue this query:
SQL > SELECT COUNT(*), prod_category_id
FROM products
GROUP BY prod_category_id
HAVING COUNT(*) = (SELECT MAX(COUNT(*)) FROM porducts);
What is the result?

• A.It generates an error because = is not valid and should be replaced by the IN operator.
• B.It executes successfully but does not give the correct output.
• C.It generate an error because the subquery does not have a GROUP BY clause.
• D.It executes successfully and gives the correct output.

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Examine the description of the CUSTOMERS table:
Which three statements will do an implicit conversion?

• A.SELECT * FROM customers WHERE insert_date=DATE'2019-01-01';
• B.SELECT * FROM customers WHERE customer_id='0001';
• C.SELECT * FROM customers WHERE TO_DATE(insert_date)=DATE'2019-01-01';
• D.SELECT * FROM customers WHERE insert_date'01-JAN-19';
• E.SELECT * FROM customers WHERE customer_id=0001;
• F.SELECT * FROM customers WHERE TO_CHAR(customer_id)='0001';

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