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Engineering
Computer ScienceA Guide to SQL9th Edition
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List two operators that you can use with subqueries as an alternate way of performing joins.

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A Guide to SQL

9th Edition
Philip J. Pratt
Publisher: Course Technology Ptr
ISBN: 9781111527273

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BuyFindarrow_forward

A Guide to SQL

9th Edition
Philip J. Pratt
Publisher: Course Technology Ptr
ISBN: 9781111527273
Chapter 5, Problem 3RQ
Textbook Problem
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List two operators that you can use with subqueries as an alternate way of performing joins.

Program Plan Intro

Subquery:

Any SQL query can be written in the sub query approach.

  • The SQL subquery returns one or more column as the result.
    • Most SQL systems return a pair wise joining of one and only one column in an inner query with one column of an outer query.
    • The data displayed form the table referenced in outer query only.

Join: Join is a relational operation, which combines the data from two or more tables into single table or view.

Explanation of Solution

 Two operators that can be used with subqueries to replace “JOIN” operations:

 The two operators “IN” and “EXISTS” can be used with subqueries rather than using “JOIN” operations.

“IN” Operator: In SQL, “IN” operator is used to select values from the table which are equal to any of the values from the mentioned table.

Syntax:

SELECT column_Name(s) FROM table_Name WHERE column_Name IN (value1, value2, ...

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A Guide to SQL
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Ch. 5 - How do you join tables in SQL?Ch. 5 - When must you qualify names in SQL commands? How...Ch. 5 - List two operators that you can use with...Ch. 5 - What is a nested subquery? In which order does SQL...Ch. 5 - What is an alias? How do you specify an alias in...Ch. 5 - How do you join a table to itself in SQL?Ch. 5 - How do you take the union of two tables in SQL?...Ch. 5 - What does it mean for two tables to be union...Ch. 5 - How do you use the ALL operator with a subquery?Ch. 5 - How do you use the ANY operator with a subquery?
Ch. 5 - Which rows are included in an inner join? What...Ch. 5 - Which rows are included in a left outer join? What...Ch. 5 - Which rows are included in a right outer join?...Ch. 5 - What is the formal name for the product of two...Ch. 5 - Use the Internet to find definitions for the terms...Ch. 5 - For each order, list the order number and order...Ch. 5 - For each order placed on October 15, 2015, list...Ch. 5 - For each order, list the order number, order date,...Ch. 5 - Use the IN operator to find the number and name of...Ch. 5 - Repeat Exercise 4, but this time use the EXISTS...Ch. 5 - Find the number and name of each customer that did...Ch. 5 - For each order, list the order number, order date,...Ch. 5 - Repeat Exercise 7, but this time order the rows by...Ch. 5 - Use a subquery to find the rep number, last name,...Ch. 5 - Repeat Exercise 9, but this time do not use a...Ch. 5 - Find the number and name of each customer that...Ch. 5 - List the item number, description, and category...Ch. 5 - List the order number and order date for each...Ch. 5 - List the order number and order date for each...Ch. 5 - List the order number and order date for each...Ch. 5 - List the order number and order date for each...Ch. 5 - List the order number and order date for each...Ch. 5 - List the item number, description, unit price, and...Ch. 5 - If you used ALL in Exercise 18, repeat the...Ch. 5 - For each rep, list the customer number, customer...Ch. 5 - For each reservation, list the reservation ID,...Ch. 5 - For each reservation for customer Ryan Goff, list...Ch. 5 - List the trip name of each trip that has Miles...Ch. 5 - List the trip name of each trip that has the type...Ch. 5 - For each reservation that has a trip date of July...Ch. 5 - List the reservation ID, trip ID, and trip date...Ch. 5 - Repeat Exercise 6, but this time use the EXISTS...Ch. 5 - Find the guide last name and guide first name of...Ch. 5 - Repeat Exercise 8 but use aliases for the table...Ch. 5 - List the trip IDs and trip names (or each pair of...Ch. 5 - Find the trip name of all reservations for hiking...Ch. 5 - List the number and name of each customer that...Ch. 5 - List the number and name of each customer that...Ch. 5 - Find the trip ID and trip name for each trip whose...Ch. 5 - Find the trip ID and trip name for each trip whose...Ch. 5 - Display the trip ID, trip name, and reservation ID...Ch. 5 - Repeat Exercise 8 but list the guide name only...Ch. 5 - Repeat Exercise 10, but this time list only hiking...Ch. 5 - For every condo, list the location number, unit...Ch. 5 - For every completed or open service request for...Ch. 5 - For every service request for janitorial work,...Ch. 5 - List the first and last names of all owners who...Ch. 5 - Repeat Exercise 4, but this time use the EXISTS...Ch. 5 - List the unit numbers of any pair of condos that...Ch. 5 - List the square footage, owner number, owner last...Ch. 5 - Repeat Exercise 7, but this time include only...Ch. 5 - List the location number, unit number, and condo...Ch. 5 - List the location number, unit number, and condo...Ch. 5 - List the location number, unit number, and condo...Ch. 5 - Find the service ID and condo ID for each service...Ch. 5 - Find the service ID and condo ID for each service...Ch. 5 - List the condo ID, square footage, owner number,...Ch. 5 - Repeat Exercise 14, but this time be sure each...Ch. 5 - Repeat Exercise 15 using a different SQL command...

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