Describe how to incrementally maintain the results of the following operations on both insertions and deletions: a.

Question:

Describe how to incrementally maintain the results of the following operations on both insertions and deletions:

a. Union and set difference.
b. Left outer join.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Database System Concepts

ISBN: 9780078022159

7th Edition

Authors: Abraham Silberschatz, Henry F. Korth, S. Sudarshan

See More Books

Question Posted: Jun 13, 2022 07:09 AM

See More Questions

Describe how to incrementally maintain the results of the following operations, on both insertions and deletions. a. Union and set difference b. Left outer join
How would the results of the following two statements differ?
Find the results of the following operations by hand and use MATLAB to check your results. a. z = 6 > 3 + 8 b. z = 6 + 3 > 8 c. z = 4 > (2 + 9) d. z = (4 < 7) + 3 e. z = 4 < 7 + 3 f. z = (4 <7)*5 g....
After the success of the companys first two months, Santana Rey continues to operate Business Solutions. (Transactions for the first two months are described in the Chapter 2 serial problem.) The...
Use Table 5.1 to find the P-value that corresponds to the standard z-score, and determine whether the alternative hypothesis is supported at the 0.05 significance level. z = 2.7 for Ha: u < 1007
Who should determine Medicaid provider reimbursement rates, and how should they compare to other insurance programs or plans? Should the federal government play a stronger role in setting provider...
Figure P10.68 shows a cross section of an aqueduct that carries water at $50 \mathrm{~m}^{3} / \mathrm{s}$. The value of Manning's $n$ is 0.015 . Find the bottom slope. Figure P10.68 45 4.0 m...
A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telecommunications company. The file Phone contains samples of 20...
Business Process Improvement. What is the title of the project? As mentioned on the first day of class, the instructor encourages students to take option B. The Operations : Which business is your...
For a 70 m long pipeline, 3m and 5m long pipes are used. If the price for shorter pipe is $10 per piece and for the other one $20 per piece, what is the price of the most profitable usage of pipes?
Suppose you need to sort relation r using sort-merge and mergejoin the result with an already sorted relation s. a. Describe how the sort operator is broken into sub operators to model the pipelining...
The lost update anomaly is said to occur if a transaction Tj reads a data item, then another transaction Tk writes the data item (possibly based on a previous read), after which Tj writes the data...
What is a swap?
Full Belly Farm grows organic vegetables and sells them to distributors and local restaurants after processing. Assume the farm s leading product for restaurant customers is a mixture of organic...
High Inventory, HighLabor, and Low Inventory appear in your Scenario Manager. If you select LowInventory and choose Show, what will happen? A)the values for inventory and total will change in your...
Blossom Company applies manufacturing overhead to jobs on the basis of machine hours used. Overhead costs are estimated to total $ 3 7 2 , 0 0 0 for the year, and machine usage is estimated at 1 5 5...
Bosco Corp. uses a process costing system. Beginning inventory for January consisted of 1 , 0 8 0 units that were 6 5 % completed. During January, 1 1 , 2 0 0 units were completed. On January 3 1 ,...
Suppose that you observe that the wages for accountants in your town have gone up and that the number of accountants employed has also gone up. Which one of the following conditions could explain...
Find the LU factorization of the following matrices: (a) (b) (c) (d) (e) (f) (g) (h) (i) 30 1 3 -1 12 311 031 210 002 033 121 120 031 123 0121 1102 0231 1010 3025 231 1210 1123 1122 3022 1401 2-31
If 2 5 9 - k 5 8 = 2 5 8 , what is the value of k?
Assume a quad-core computer system can process database queries at a steady state rate of requests per second. Also assume that each transaction takes, on average, a fixed amount of time to process....
Implement the four-input odd-parity function with AND and OR gates using bubbled inputs and outputs.
Assume that X consists of 3 bits, x2 x1 x0. Write four logic functions that are true if and only if X contains only one 0 X contains an even number of 0s X when interpreted as an unsigned binary...
- Let [121] A-03 1 4 12 If possible, find a matrix C such that 1 2 AC=01 41
Provide References In September of 2015, the EPA issued Volkswagen ( OTCPK:VLKAY ) a notice of violation of the Clean Air Act of 1963. The EPA accused the Volkswagen Group of intentionally...
2. Find c such that A is invertible 1 0 A= -1 -1 3 1 0 2c -4]

Describe how to incrementally maintain the results of the following operations on both insertions and deletions: a.

Question:

Step by Step Answer:

a Given materialized view v r s when a tuple is inserted in r we check if it is present in v and if ...View the full answer

Database System Concepts

Students also viewed these Computer science questions