(Q3): search using any search engine (such as google, Bing) to find the research in (effects of air pollution on the human body) this research must have specific time (from 2005- 2014), and the file need to find in PDF format, and research contained these words (air, human lungs)?

(Q3): search using any search engine (such as google, Bing) to find the research in (effects of air pollution on the human body) this research must have specific time (from 2005- 2014), and the file need to find in PDF format, and research contained these words (air, human lungs)?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Which of the following is true? a. Data stored in a relational database can be retrieved both quickly and easily by the computer. b. Data stored in a relational database can be displayed in any order. c. A relational database stores data in a column and row format. d. All of the above.
Requirements: You are to ask the user: 1) For the name of the input file (CTIM375-Input.dat; a downloadable file), 2) Read the file into an array, 3) Sort the array in ascending order using the name field, 4) Add a field at the end of the records that will contain the average of all the amount fields within the record, and 5) Produce a comma-separated value (.CSV) file called "CTIM375-Output.csv".
e) Search for instances of the string password (all cases) using cat and grep. $ f) Search for the number of instances of the string password (all cases) using cat, grep and wc. $ From your above commands, can you determine if there are case-sensitive instances of the string password in the wordlist-probable.txt file? How do you know?
(homework) by Html write the code for a site that contains one page and this page contains three buttons, the first button to upload Excel files from the computer (more than one file), the second button to match the contents of the uploaded files together, and the third button to create an Excel file that contains The contents of the previous two files, but the content in both files is separated from the content in one of the two files and saved on the desktop
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(8) Create or add the last source file called Database.cpp. In this file, you are required to compile or integrate the listed fields by creating the structure to embody the Account entity. The fields are accno, acname, type, intrate, balance and they respectively represent the account number, account name, account type, the interest rate and account balance. After the structure has been declared with its fields, do the following tasks in the main function. (a) Create an array account of size 7 to store accounts. Then initialize the array with 7 account's sample data-records shown below. (b) Do a sample display just like the display shown below of 7 records. (c) After the display, write a block comment for a small search system where the search will be conducted the id number. (d) Following the comment, display a prompt and read an account number. Then, using the while-loop, test if the account number is positive. If so, enter the loop body for action. Quit otherwise. (e) In the while…
2.3) Which one is not one of the definitions of a NULL value?a) The attribute does not apply to this tuple (i.e. Not Applicable → NA)b) The data type is not suitable for the entry datac) The attribute value for this tuple is unknownd) The attribute value for this tuple will be determined latere) The value is known but absent2.4) Which below statement is not true for indexes?a) Each table may contain at most one clustered indexb) Each table may contain none to many non-clustered indexc) Actual data is kept in the leaf of non-clustered indexd) Indexes are used to store data and allow efficient data retrievale) Non-clustered indexes increase data retrieval performance but decreases data modification performance2.5) Which below is not one of the isolation levels in transaction processing?a) Consistent read b) Read uncommitted c) Read committed d) Repeatable read e) Serializable
Holiday Travel Vehicle (HTV) sells new recreational vehicles and travel trailers. When new vehicles arrive at HTV, a new vehicle record is created. Included in the new vehicle record are a vehicle serial number, name, model, year, manufacturer, and base cost. When a customer arrives at HTV, he or she works with a salesperson to negotiate a vehicle purchase. When a purchase has been agreed upon, a sales invoice is completed by the salesperson. The invoice summarizes the purchase, including full customer information, information on the trade-in vehicle (if any), the trade-in allowance, and information on the purchased vehicle. The invoice also summarizes the final negotiated price, plus any applicable taxes and license fees. If the customer requests dealer-installed options (simply options), they are listed on the invoice as well. A customer may decide to have no options added to the vehicle or may choose to add many options. Dealer-installed options are described by an option code,…