Given relations, R and S,

Table 1: DDL create table R (col_a char primary key, col_b char ); create table S (col_c char primary key, col_d char, foreign key (col_d) references R(col_a) ); insert into R values (‘a’, ‘d’), (‘b’, ‘e’), (‘c’, ‘f’); insert into S values (‘p’, ‘a’), (‘q’, ‘b’), (‘r’, ‘c’), (‘s’, ‘a’), (‘t’, ‘b’); Based on Table 1: DDL, Show the result of each SQL query below. Use a table or put each row on a separate line with fields separated by tabs so that the columns line up. Clearly separate answers. select R.A, T.C from R, T where R.A = T.B order by R.A, T.C; select distinct R.A, T.C from R, T where R.A = T.B order by R.A, T.C; select R.A, COUNT(T.C) AS C_COUNT from R, T where R.A = T.B group by R.A;

  In SQL, a comparison to null

Figure 3: Authors Schema Based on Figure 3: Authors Schema, write SQL statements for each of the following. Retrieve all book titles and their genres. Find the names of all authors from the UK. List the names of all borrowers who have not returned their book yet. Find the title of the book borrowed by ‘Bob’. Count the number of books published after the year 2000. Get a list of books along with their authors’ names. Find the most recently borrowed book. Find how many books each author has written. Find books that belong to the ‘Fantasy’ genre. Retrieve the names of borrowers who borrowed books written by George Orwell.  

Match terms and descriptions

What does this query do? SELECT S.Name, S.Major FROM STUDENT S WHERE NOT EXISTS ( SELECT * FROM GRADE_REPORT G WHERE G.StudentNum=S.StudentNum AND G.Grade=’E’);  

The text refers to 6 specific types of compensation. Identify 3 and explain what they are.

What does this expression mean/do?              Dno average(salary)(Employee)

Given the relations R={a, b, c}, S={b, d}, R S yields a relation containing: ( = intersection)

Genetic variance in organisms comes about through