15. List the first name for all contacts and whether they have a spouse or not (yes/no). Order by the first name. For example, your result set might look like this: | firstname | Married? | Biff | George | Jennifer | Lorraine | Marty | no | yes | no | yes | no

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter7: File Handling And Applications

Section: Chapter Questions

Problem 1PE

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Question

+----+
+-
--+-
| id | firstname | lastname | spouse_id |
+---
+
1 | Marty
2 | Jennifer
3 | Lorraine
4 | Biff
5 | George
| McFly
| Parker
NULL |
NULL |
|
|
| McFly
| Tannen
| McFly
5 |
NULL |
|
3 |
+----+

15. List the first name for all contacts and whether they have a spouse or not (yes/no). Order by the first
name. For example, your result set might look like this:
| firstname
| Married?
|
| Biff
| George
| Jennifer
| Lorraine
| Marty
| no
| yes
| no
| yes
| no

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