Subquery:

The subquery is a query that is placed inside another SQL query and also embedded inside the “WHERE” clause. It is also called as inner query or nested query.

The subqueries can be used with the “INSERT”, “SELECT”, “DELETE” and “UPDATE” statements along with the operations such as “=”, “<”, “>”, “<=”, “>=”, “IN”, “BETWEEN”.

Characteristics of subquery:

The basic characteristics of subqueries are:

The subquery normally expressed inside the parentheses.

The first statement in the SQL is called as outer query...

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Chapter 8 Solutions

EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT

Ch. 8 - What is a cross join? Give an example of its...Ch. 8 - What three join types are included in the outer...Ch. 8 - Using tables named T1 and T2, write a query...Ch. 8 - Prob. 4RQ Ch. 8 - Prob. 5RQ Ch. 8 - Prob. 6RQ Ch. 8 - Prob. 7RQ Ch. 8 - What does it mean to say that SQL operators are...Ch. 8 - Prob. 9RQ Ch. 8 - Prob. 10RQ

Ch. 8 - Prob. 11RQ Ch. 8 - Prob. 12RQ Ch. 8 - Given the employee information in Question 11,...Ch. 8 - Prob. 14RQ Ch. 8 - Prob. 15RQ Ch. 8 - Prob. 16RQ Ch. 8 - What Oracle function should you use to calculate...Ch. 8 - Prob. 18RQ Ch. 8 - What string function should you use to list the...Ch. 8 - Prob. 20RQ Ch. 8 - Prob. 21RQ Ch. 8 - Prob. 22RQ Ch. 8 - Prob. 23RQ Ch. 8 - Prob. 24RQ Ch. 8 - Prob. 1P Ch. 8 - Insert the data into the tables you created in...Ch. 8 - Prob. 3P Ch. 8 - Prob. 4P Ch. 8 - Prob. 5P Ch. 8 - Prob. 6P Ch. 8 - Prob. 7P Ch. 8 - Prob. 8P Ch. 8 - Prob. 9P Ch. 8 - Modify the CUSTOMER table to include two new...Ch. 8 - Assuming that you completed Problem 10, write the...Ch. 8 - Assuming that the CUSTOMER table contains a...Ch. 8 - Write the query that lists the average age of your...Ch. 8 - Write the trigger to update the CUST_BALANCE in...Ch. 8 - Prob. 15P Ch. 8 - Prob. 16P Ch. 8 - Write a trigger to update the customer balance...Ch. 8 - Write a procedure to delete an invoice, giving the...Ch. 8 - Prob. 19P Ch. 8 - Prob. 20P Ch. 8 - Prob. 21P Ch. 8 - Prob. 22P Ch. 8 - Write a single SQL command to increase all price...Ch. 8 - Prob. 24P Ch. 8 - Prob. 25P Ch. 8 - Prob. 26P Ch. 8 - Prob. 27P Ch. 8 - Create a trigger named trg_line_total to write the...Ch. 8 - Create a trigger named trg_line_prod that...Ch. 8 - Create a stored procedure named prc_inv_amounts to...Ch. 8 - Create a procedure named prc_cus_balance_update...Ch. 8 - Modify the MODEL table to add the attribute and...Ch. 8 - Prob. 33P Ch. 8 - Modify the CHARTER table to add the attributes...Ch. 8 - Write the sequence of commands required to update...Ch. 8 - Write the sequence of commands required to update...Ch. 8 - Write the command required to update the...Ch. 8 - Write the command required to update the...Ch. 8 - Write the command required to update the...Ch. 8 - Prob. 40P Ch. 8 - Create a trigger named trg_char_hours that...Ch. 8 - Create a trigger named trg_pic_hours that...Ch. 8 - Create a trigger named trg_cust_balance that...Ch. 8 - Prob. 44P Ch. 8 - Prob. 45P Ch. 8 - Prob. 46P Ch. 8 - Prob. 47P Ch. 8 - Prob. 48P Ch. 8 - Prob. 49P Ch. 8 - Prob. 50P Ch. 8 - Prob. 51P Ch. 8 - Prob. 52P Ch. 8 - Prob. 53P Ch. 8 - Prob. 54P Ch. 8 - Prob. 55P Ch. 8 - Prob. 56P Ch. 8 - Prob. 57P Ch. 8 - Prob. 58P Ch. 8 - Prob. 59P Ch. 8 - Prob. 61P Ch. 8 - Prob. 62P Ch. 8 - Prob. 63P Ch. 8 - Prob. 64P Ch. 8 - Prob. 65P Ch. 8 - Prob. 66P Ch. 8 - Prob. 67P Ch. 8 - Alter the DETAILRENTAL table to include a derived...Ch. 8 - Update the DETAILRENTAL table to set the values in...Ch. 8 - Alter the VIDEO table to include an attribute...Ch. 8 - Update the VID_STATUS attribute of the VIDEO table...Ch. 8 - Alter the PRICE table to include an attribute...Ch. 8 - Prob. 73C Ch. 8 - Prob. 76C

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