Database Systems: Design, Implementation, & Management
13th Edition
ISBN: 9781337627900
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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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:
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R
B
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C
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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.
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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.
Convert this ER model to a list of tables (Please provide a picture of the tables from Access)Provide the queries that implement the database
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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- Consider three transactions: T1, T2, and T3. S: W1(A); R2(A);W3(B); W2(A);W1(A); R2(C); R3(B); R3(A); W3(B); C1;C2;C3 a) Draw the precedence graph for the schedule. Is the schedule conflict- serializable? b) Is the schedule recoverable?arrow_forwardDiscuss the ACID properties of a transaction with the help of code example.arrow_forwardWe need to first make some adjustments to certain variables in Tableau and better understand the difference between Dimensions and Measures. Dimensions (shown as blue variable names) are normally attributes about certain transactions that can't be summed or otherwise quantified (e.g., dates, product numbers, invoice numbers, etc.), Measures (shown in green variable names), on the other hand, are normally the outcome variables we are most interested in (e.g., invoice total, quantity shipped, etc.). Sometimes, Tableau misclassifies these variables and we need to make changes before we can continue. In the shipping file, Tableau has classified Customer No. and Invoice No. as Measures instead of Dimensions. We need to set both of these as dimensions. • Right-click on Customer Number and press "Convert to Dimension." • Repeat the previous step for Invoice Number. What other "number" has been imported as a Measure instead of a Dimension? Please change it to a Measure Dimension using the…arrow_forward
- 15 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_forwardAssume 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 ?arrow_forwardIn a database transaction, the two main operations are READ and WRITE operations. So, there is a need to manage these two operations in the concurrent execution of the transactions as if these operations are not performed in an interleaved manner, and the data may become inconsistent. Consider the following scheduled transactions T1, T2, T3, and T4. T1 T2 T3 T4 Reads(X) Writes(X) Reads(Y) Writes(Y) Commit Reads(X) Time Reads(X) Writes(X) Reads(Y) Rollback Writes(Y) Writes(X) Commit • Identify all pair of transactions based on the occurred problem between two transactions (specify pairs, e.g., T1 => T2; T3=> T2; T3 =>T4; etc.). • Specify the name of a problem for each detected pair of transactions. • Justify the occurred problem for each pair of transactions.arrow_forward
- Develop a BasicMOST analysis of the sequence of activities for the tablearrow_forwardSuppose relations R(A,B) and S(B,C,D) are as followsarrow_forwardWRITE 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_forward
- Give an explanation of the difference between disjoint constraints and overlapping ones.arrow_forwardExplain the mechanics of double constraints. Tell me, what are they?arrow_forwardConsider a database containing two relations: R(A,B,C) and S(D,E,F). For each of three (your choice) of the 12 rewriting rules for relational algebra expression, give an example pair of relational algebra expressions involving R and S such that the rule rewrites one expression to the other expression, and give another example pair to show the rewriting rule cannot be used since some of the conditions for the rule arenot satisfiedarrow_forward
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