Database Systems: Design Implementation & Management
11th Edition
ISBN: 9781305850378
Author: Coronel
Publisher: Cengage
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Chapter 11, Problem 24P
Problems 22–24 are based on the following query:
| SELECT | P_CODE, P_DESCRIPT, P_PRICE, P.V_CODE, V_STATE |
| FROM | PRODUCT P, VENDOR V |
| WHERE | P.V_CODE = V.V_CODE |
| AND V_STATE = 'NY' | |
| AND V_AREACODE = '212' | |
| ORDER BY | P_PRICE; |
Write the command(s) used to generate the statistics for the PRODUCT and VENDOR tables.
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Task 6:
The Car Maintenance team considered that the available maintenance tasks should also have the price information in the database. Alter the MAINTENANCE_TYPES table to include a new column named MAINTENANCE_PRICE of type FLOAT.
Alter the MAINTENANCE_TYPES table to include pricing information.
The OR_CASE table has one bro per surgical case. The OR_LOG table has one row per surgical log. It's LOG_ID column identifies each log. If a case has an associated log, OR_CASE.LOG_ID will store the logs ID. Otherwise, it will be null. A query uses the following join:
FROM OR_CASE
INNER JOIN OR_LOG
ON OR_CASE.LOG_ID=OR_LOG.LOG_ID
which of the following would be the results?
A. A log with no associated case.B. A log with an associated case.
C. A case with no associated log.D. Rows with no case or log.
Task 2:
The Driver Relationship team wants to ensure that the all driving license IDs in the active drivers table have the length of 7. Alter the ACTIVE_DRIVERS table created in Chapter 8, Activity 1 to check the length of the DRIVER_DRIVING_LICENSE_ID.
Add a CHECK to the ACTIVE_DRIVERS table to enforce a driver license length of 7.
Test Query:
SELECT DISTINCT(constraint_name)
FROM information_schema.check_constraints
WHERE constraint_schema = 'InstantRide'
AND constraint_name = 'ACTIVE_DRIVERS_chk_1'
Expected Results
CONSTRAINT_NAME
ACTIVE_DRIVERS_chk_1
Chapter 11 Solutions
Database Systems: Design Implementation & Management
Ch. 11 - Prob. 1RQCh. 11 - What index should you create? Write the required...Ch. 11 - What is the focus of most performance-tuning...Ch. 11 - What are database statistics, and why are they...Ch. 11 - How are database statistics obtained?Ch. 11 - What database statistics measurements are typical...Ch. 11 - How is the processing of SQL DDL statements (such...Ch. 11 - In simple terms, the DBMS processes a query in...Ch. 11 - If indexes are so important, why not index every...Ch. 11 - What is the difference between a rule-based...
Ch. 11 - Prob. 11RQCh. 11 - What are some general guidelines for creating and...Ch. 11 - Prob. 13RQCh. 11 - Prob. 14RQCh. 11 - Prob. 15RQCh. 11 - SELECT SELECT EMP_LNAME, EMP_FNAME, EMP_AREACODE,...Ch. 11 - Problem 1 and 2 are based on the following query:...Ch. 11 - Using Table 11.4 as an example, create two...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Prob. 6PCh. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Problems 1721 are based on the following query:...Ch. 11 - SELECT SELECT P_CODE, P_DESCRIPT, P_PRICE,...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Prob. 27PCh. 11 - Problems 27 and 28 are based on the following...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...
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