A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 6, Problem 12CAT
Program Plan Intro
Primary key:
- To identify each record in a table, at least there must be one data field, which should be unique.
- That is corresponding data field of every record should be unique.
- It is called primary key.
- Primary key is used to identify the unique record from a collection of records.
“VARCHAR” datatype:
- The “VARCHAR” datatype will hold a variable length string which contain numbers, special characters and letters.
- The maximum size is specified in parenthesis. The “VARCHAR” datatype can store up to 255 characters.
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Instructions
Write SQL queries to solve the following problems. We will be using the “university” database. All queries should involve only the instructor table. After you are done, save your work as .sql file and turn in the .sql file into Moodle for grading.
Write a SQL statement to display all columns using the SQL asterisk (*) wild-card character.
Write a SQL statement to display ID and name of the instructors (ID appears first).
Write a SQL statement to display department names.
Write a SQL statement to display unique department names. (expect 7 rows returned)
Write a SQL statement to display all info about instructors having a salary greater than 75000. (expect 6 rows returned)
Write a SQL statement to display department name, instructor name, and salary for instructors that have a salary less than 70000. Sort the results in ascending order by department name. (expect 4 rows returned)
Write a SQL statement to display name, department name, and salary for instructors that have a…
Use FOR loop for your
cursor.
Write a PL/SQL block to read
and display the job_id and
number of employees per
job_id. Accept input from the
user to get the number of
employees he wants to see in
the output.
Display also the number of
records returned by your
PL/SQL block.
Chapter 6 Solutions
A Guide to SQL
Ch. 6 - Prob. 1RQCh. 6 - Which command and clause adds an individual row to...Ch. 6 - How do you add data from an existing table to...Ch. 6 - Prob. 4RQCh. 6 - Which command removes rows from a table?Ch. 6 - Which command makes updates permanent?Ch. 6 - Which command reverses updates? Which updates are...Ch. 6 - Prob. 8RQCh. 6 - What is the format of the SET clause that changes...Ch. 6 - Which command and clause adds a column to an...
Ch. 6 - Prob. 11RQCh. 6 - Which command deletes a table and all its data?Ch. 6 - Prob. 13RQCh. 6 - Prob. 1TDCh. 6 - Prob. 2TDCh. 6 - Prob. 3TDCh. 6 - Prob. 4TDCh. 6 - Prob. 5TDCh. 6 - Prob. 6TDCh. 6 - In the NONGAME table, change the category for item...Ch. 6 - Prob. 8TDCh. 6 - Prob. 9TDCh. 6 - Prob. 10TDCh. 6 - Prob. 11TDCh. 6 - Use SQL to make the following changes to the...Ch. 6 - Prob. 2CATCh. 6 - Prob. 3CATCh. 6 - Prob. 4CATCh. 6 - Prob. 5CATCh. 6 - Prob. 6CATCh. 6 - Add to the PADDLING table a new character column...Ch. 6 - Prob. 8CATCh. 6 - Prob. 9CATCh. 6 - Prob. 10CATCh. 6 - Prob. 11CATCh. 6 - Prob. 12CATCh. 6 - Use SQL to make the following changes to the...Ch. 6 - Prob. 2SCGCh. 6 - Prob. 3SCGCh. 6 - Prob. 4SCGCh. 6 - Prob. 5SCGCh. 6 - Prob. 6SCGCh. 6 - Prob. 7SCGCh. 6 - Prob. 8SCGCh. 6 - Prob. 9SCGCh. 6 - Prob. 10SCGCh. 6 - Prob. 11SCGCh. 6 - Prob. 12SCG
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