Database Systems: Design Implementation & Management
11th Edition
ISBN: 9781305850378
Author: Coronel
Publisher: Cengage
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Chapter 10, Problem 7P
Program Plan Intro
Transaction log:
It is a feature used by the DBMS (
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Suppose relations R(A,B) and S(B,C,D) are as follows:
3
5
A
1
R
B
6
2
4
4
6
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C
5
7
c. The full outer join has 3 NULLs.
d. The left outer join has 4 NULLS.
S
A
Compute the full outer join on B, the left outer join on B, and the right outer join on B. In each case, R is the left operand and S is the right operand. Then, answer the following questions for each of the three resu
How many rows are there in the result?
2 How many NULL's appear in the result?
Finally, find the correct statement in the list below.
O a. The right outer join has 2 rows.
Ob. The right outer join has no NULLS.
D
1
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WRITE THE CODE OF MYSQL IN PYTHON
Create database and tables as given below by using Python.
(a) Market database
(b) Vendor: vendor_id integer, vendor_name varchar, license_start
date, license_end date
(c) Item: item_id integer, item_name varchar, item_type varchar,
previous_price float, last_sold_date date
(d) Auction: auction_id integer, vendor_id integer, item_id integer,
price float
Choose primary and foreign keys depending on the relations in Market
database design.
Assume a relation 'R' having 200 records.
These records are stored in blocks having
block factor as 20. Consider another relation
'S' having 120 records and all these records
are stored in 30 blocks. These two tables
have to be joined using nested loop join
algorithm. At any instance main memory can
hold exactly one block of R and one block of
S. What are the total number of block access
required to join R and S
?
Chapter 10 Solutions
Database Systems: Design Implementation & Management
Ch. 10 - Prob. 1RQCh. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Prob. 4RQCh. 10 - Prob. 5RQCh. 10 - Prob. 6RQCh. 10 - Prob. 7RQCh. 10 - Prob. 8RQCh. 10 - Prob. 9RQCh. 10 - Prob. 10RQ
Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - Prob. 14RQCh. 10 - Prob. 15RQCh. 10 - Prob. 16RQCh. 10 - Prob. 17RQCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- How to write sequence of transactions if there is loop and cycle or transactions are non-conflict?arrow_forward15 Suppose that Distributed Database System(DDB) has three sites; Sitel:Students table: 1000 rows, 10 Byte row size, Site2: Grades table: 2000 rows, 50 Byte row size, and Site3: Request a query with the result 100 rows, 30 bytes row size; What is the amount of data transfer in bytes after processing the following strategy(Transfer Student table and Grades table to site 3)7 Note: (insert only final result(number) without the equation) Enter your answerarrow_forwardSuppose relations R(A,B) and S(B,C,D) are as followsarrow_forward
- WRITE THE OF MYSQL IN PYTHON, JUST ANSWER THE 2ND QUESTION BY LOOKING AT THE FIRST QUESTION Create database and tables as given below by using Python. (a) Market database (b) Vendor: vendor id integer, vendor name varchar, license start date, license end date (c) Item:itemidinteger,itemnamevarchar,itemtypevarchar, previous price float, last sold date date (d) Auction: auction id integer, vendor id integer, item id integer, price float Choose primary and foreign keys depending on the relations in Market database design. Create arrays of at least 5 di↵erent records. Use these arrays to populate each table in the database.arrow_forwardGive an explanation of the difference between disjoint constraints and overlapping ones.arrow_forwardExplain the mechanics of double constraints. Tell me, what are they?arrow_forward
- Develop a program that takes as input: 1- A relation R with a set of attributes. The number of attributes should be variable. 2- A set of functional dependencies F that holds on R. The number of functional dependencies should be variable. And your program should do the following: 1- Find and print out the list of all possible candidate keys, (not the super keys), of R based on F.arrow_forwardExplain the concept of two-way data binding in more detail and provide examples of situations where it is particularly useful.arrow_forwardWrite the Python syntax for creating a 2-dimensional identity matrix E with values 1 and 0 in the top row, and 0 and 1 in the bottom row. Also, write the syntax for selecting the second column from matrix Earrow_forward
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