单选题In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? （）A Immediately after the SELECT clauseB Before the WHERE clauseC Before the FROM clauseD After the ORDER BY clauseE After the WHERE clause

第1题：

第2题：

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第4题：

You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）

• A、SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';
• B、SELECT last_name FROM EMP WHERE last name ='*A%'
• C、SELECT last_name FROM EMP WHERE last name ='_A%';
• D、SELECT last_name FROM EMP WHERE last name LIKE '*A%'

第5题：

Evaluate this SQL statement: SELECT e.emp_name, d.dept_name FROM employees e JOIN departments d USING (department_id) WHERE d.department_id NOT IN (10,40) ORSER BY dept_name; The statement fails when executed. Which change fixes the error? （）

• A、remove the ORDER BY clause
• B、remove the table alias prefix from the WHERE clause
• C、remove the table alias from the SELECT clause
• D、prefix the column in the USING clause with the table alias
• E、prefix the column in the ORDER BY clause with the table alias
• F、replace the condition "d.department_id NOT IN (10,40)" in the WHERE clause with "d.department_id <> 10 AND d.department_id <> 40"

第6题：

第7题：

In which four clauses can a subquery be used?（）

• A、in the INTO clause of an INSERT statement
• B、in the FROM clause of a SELECT statement
• C、in the GROUP BY clause of a SELECT statement
• D、in the WHERE clause of a SELECT statement
• E、in the SET clause of an UPDATE statement
• F、in the VALUES clause of an INSERT statement

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第9题：

The accounts receivable department requested an accounts status to allow users to enter either a customer name, customer number, customer phone number and then display the customer out standing balance. You want to restrict the data retrieved based on values entered by the users. Which where clause would you write in the query to select statement to accomplish this task?（）

• A、&p_where_clause 
• B、:p_where_clause 
• C、WHERE CUST_ID=P_CUST_ID or cust_name=:p_cust_name or cust_phone=:p_cust_phone 
• D、Where cust_ID=&p_custid cust_name=&p_cust_name or cust_phone=&p_cust_phone

第10题：

Which two statements are true regarding the ORDER BY clause? （）

• A、The sort is in ascending by order by default.
• B、The sort is in descending order by default.
• C、The ORDER BY clause must precede the WHERE clause.
• D、The ORDER BY clause is executed on the client side.
• E、The ORDER BY clause comes last in the SELECT statement.
• F、The ORDER BY clause is executed first in the query execution.