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Data Definition Language (DDL): It is used for creating tables and other structures. They perform operations like, creating tables, modifying
Table Creation:
Creating table comes under Data Definition Language (DDL). Syntax for creating table is as follows:
CREATE TABLE TABLE_NAME (
Column1 datatype,
Column2 datatype,
…
);
Explanation of Solution
b.
Query:
create table car (license char(20) primary key, model varchar(70) not null, year int);
Explanation:
The above query is used cr...
Explanation of Solution
c.
Query:
create table accident (report_number char(20) primary key, date date(70), location varchar(50));
Explanation:
The above query is used cre...
Explanation of Solution
d.
Query:
create table owns (driver_id char(20) references driver, license char(20) references car, primary key(driver_id, license));
Explanation:...
Explanation of Solution
e.
Query:
create table participated (report_number char(20) primary key, license char(20) references car, driver_id char(20) references driver, damage_amount dec(6,2) )
Explanation:
The above query is used creat...
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Chapter 3 Solutions
Database System Concepts
- What is the worst case time complexity of the following algorithm for i = 1 to x do for j = 2^((i-1)x) to 2^(in) do print(i,j)arrow_forwardProve for each pair of expression f(n) and g(n) whether f(n) is big O, little o Ω,ω or Θ of g(n). For each case it is possible that more than one of these conditions is satisfied:1. f(n) =log(n2^n), g(n) = log(sqrt(n)2^(n^2))2. f(n) =nsqrt(n) +log(n^n), g(n) =n + sqrt(n)lognarrow_forwardI need to make a parallel version of this sequential codearrow_forward
- I need to make a parallel version of this sequential code.arrow_forwardBenefits of using arrays as instance variables: What are the advantages of incorporating arrays as instance variables within a class? Initializing and managing arrays: How do you initialize and manage arrays within class constructors and mutators (setters)? Example of using arrays as instance variables: Share an example where you have used arrays as instance variables and discuss its application in a real-world scenario. Common mistakes with arrays as instance variables: What are some common mistakes to avoid when working with arrays as instance variables? Information hiding violations: What is the potential violation of information hiding when using arrays as instance variables? How can this be resolved?arrow_forwardDo you think that computers should replace teachers? Give three references with your answer.arrow_forward
- Is online learning or face to face learning better to teach students around the around the world? Give reasons for your answer and provide two references with your response. What are benefits of both online learning and face to face learning ? Give two references with your answer. How does online learning and face to face learning affects students around the world? Give two references with your answer.arrow_forwardExplain Five reasons if computers should replace teachers. Provide three references with your answer. List three advantages and three disadvantages face to face learning and online learning may have on children. Provide two references with your answer.arrow_forwardYou were requested to design IP addresses for the following network using the address block 10.10.10.0/24. Specify an address and net mask for each network and router interfacearrow_forward
- For the following network, propose routing tables in each of the routers R1 to R5arrow_forwardFor the following network, propose routing tables in each of the routers R1 to R5arrow_forwardUsing R language. Here is the information link. http://www.cnachtsheim-text.csom.umn.edu/Kutner/Chapter%20%206%20Data%20Sets/CH06PR18.txtarrow_forward
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