Homework Answers
Option B is correct
This will list the ids of nodes that link to both nodes with id=3 and the node with id = 4
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Consider the following table definitions: create table node (node_id integer primary key, node_color varchar(10)); create table...
CREATE TABLE person ( pid INTEGER NOT NULL ,pname VARCHAR(30) NOT NULL ,PRIMARY KEY (pid) );...
CREATE TABLE person ( pid INTEGER NOT NULL ,pname VARCHAR(30) NOT NULL ,PRIMARY KEY (pid) ); CREATE TABLE organization ( oid INTEGER NOT NULL ,oname VARCHAR(30) NOT NULL ,PRIMARY KEY (oid) ); CREATE TABLE venue ( vid INTEGER NOT NULL ,area CHAR(1) NOT NULL ,capacity INTEGER NOT NULL ,PRIMARY KEY (vid) ); CREATE TABLE calendar ( vid INTEGER NOT NULL ,date DATE NOT NULL ,price NUMERIC(6,2) NOT NULL ,PRIMARY KEY(vid,date) ,FOREIGN KEY(vid) REFERENCES venue(vid) ); CREATE TABLE event ( eid...
CREATE TABLE Gender ( gender CHAR(1), description VARCHAR(10), PRIMARY KEY (gender) ); CREATE TABLE People (...
CREATE TABLE Gender ( gender CHAR(1), description VARCHAR(10), PRIMARY KEY (gender) ); CREATE TABLE People ( ID INT, name VARCHAR(50), gender CHAR(1), height FLOAT, PRIMARY KEY (ID), FOREIGN KEY (gender) REFERENCES Gender (gender) ); CREATE TABLE Sports ( ID INT, name VARCHAR(50), record FLOAT, PRIMARY KEY (ID), UNIQUE (name) ); CREATE TABLE Competitions ( ID INT, place VARCHAR(50), held DATE, PRIMARY KEY (ID) ); CREATE TABLE Results ( peopleID INT NOT NULL, competitionID INT NOT NULL, sportID INT NOT NULL,...
CREATE TABLE Users ( userId varchar (30) NOT NULL, pass varchar (30),
CREATE TABLE Users ( userId varchar (30) NOT NULL, pass varchar (30), fname varchar (50), lname varchar (50), email varchar (50), gender char(1), age integer, banned boolean, PRIMARY KEY (userId), UNIQUE(email)) CREATE TABLE FavSellers ( userId varchar (30), sellerId varchar (30), PRIMARY KEY (userId, sellerId), FOREIGN KEY(userId) references Users, FOREIGN KEY(sellerId) references Users(userId)) CREATE TABLE Items ( itemId integer, title varchar (50), ...
create table candidate ( cand_id varchar(12) primary key, -- cand_id name varchar(40) --...
create table candidate ( cand_id varchar(12) primary key, -- cand_id name varchar(40) -- cand_nm ); create table contributor ( contbr_id integer primary key, name varchar(40), -- contbr_nm city varchar(40), -- contbr_city state varchar(40), -- contbr_st zip varchar(20), -- contbr_zip employer varchar(60), -- contbr_employer occupation varchar(40) -- contbr_occupation ); create table contribution ( contb_id integer primary key, cand_id varchar(12), --...
CREATE TABLE actor( id INTEGER NOT NULL, name VARCHAR(100), PRIMARY KEY (id) ); SELECT name FROM...
CREATE TABLE actor( id INTEGER NOT NULL, name VARCHAR(100), PRIMARY KEY (id) ); SELECT name FROM actor WHERE name LIKE 'M%'; Q. How to run explain plan on the above query and display its output?
CREATE TABLE DEPT ( DEPTNO INTEGER NOT NULL, DNAME VARCHAR(14), LOC VARCHAR(13), PRIMARY KEY (DEPTNO)); INSERT...
CREATE TABLE DEPT (
DEPTNO INTEGER NOT NULL,
DNAME VARCHAR(14),
LOC VARCHAR(13),
PRIMARY KEY (DEPTNO));
INSERT INTO DEPT VALUES (10,'SPORTS','NEW YORK');
INSERT INTO DEPT VALUES (20,'HOME','DALLAS');
INSERT INTO DEPT VALUES (30,'OUTDOOR','CHICAGO');
INSERT INTO DEPT VALUES (40,'CLOTHING','BOSTON');
CREATE TABLE EMP (
EMPNO INTEGER NOT NULL,
ENAME VARCHAR(10),
JOB VARCHAR(9),
MGR INTEGER,
SAL FLOAT,
COMM FLOAT,
DEPTNO INTEGER NOT NULL,
FOREIGN KEY (DEPTNO) REFERENCES DEPT (DEPTNO),
FOREIGN KEY (MGR) REFERENCES EMP(EMPNO),
PRIMARY KEY (EMPNO));
INSERT INTO EMP VALUES (7839,'KING','PRESIDENT',NULL,
5000,NULL,10);
INSERT INTO...
This is database system concept. 1.Find the ids of instructors who are also students using a...
This is database system concept. 1.Find the ids of instructors who are also students using a set operation. Assume that a person is identified by her or his id. So, if the same id appears in both instructor and student, then that person is both an instructor and a student. Remember: set operation means union, intersect or set difference. 2.Find the ids of instructors who are also students using the set membership operator. 3.Find the ids of instructors who are...
The following SQL DDL script creates a database for a social network application. create table userProfile(...
The following SQL DDL script creates a database for a social network application. create table userProfile( id char(10) primary key, firstName varchar(20), lastName varchar(20), dob date, email varchar(30) ); create table foaf( userid char(10), friendID char(10), timeEstablished date, constraint pk primary key(userid, friendID), constraint fk1 foreign key(userid) references userProfile(id), constraint fk2 foreign key(friendID) references userProfile(id) ); create table activity( actID char(20) primary key, topic varchar(20), description varchar(100), location varchar(20), ActivityDate date, hostUser char(10), foreign key(hostUser) references userProfile(id) ); create table...
Given: Create table Book ( Book_id integer, Book_title varchar(50), Author varchar(50), Publish_date date, Type varchar(30), Edition...
Given: Create table Book ( Book_id integer, Book_title varchar(50), Author varchar(50), Publish_date date, Type varchar(30), Edition number, Quantity number, Primary key (Book_id) ); insert into Book values (1,'The Old Man and the Sea','Hemingway' ,date '1978-1-1','hardcopy',3,2); insert into Book values (2,'The Old Man and the Sea','Hemingway' ,date '1979-1-1','hardcopy',4,1); insert into Book values (3,'The Old Man and the Sea','Hemingway' ,date '1980-1-1', 'hardcopy',5,10); insert into Book values (4,'A Farewell to Arms','Hemingway' ,date '1986-1-1','hardcopy',2,18); insert into Book values (5,'For Whom the Bell Tolls','Hemingway' ,date...
-- Schema definition create table Customer ( cid smallint not null, name varchar(20), ...
-- Schema definition
create table Customer (
cid smallint not null,
name varchar(20),
city varchar(15),
constraint customer_pk
primary key (cid)
);
create table Club (
club varchar(15) not null,
desc varchar(50),
constraint club_pk
primary key
(club)
);
create table Member (
club varchar(15) not null,
cid
smallint not null,
constraint member_pk
primary key (club,
cid),
constraint mem_fk_club
foreign key (club)
references Club,
constraint mem_fk_cust...
CREATE TABLE DEPT (
DEPTNO INTEGER NOT NULL,
DNAME VARCHAR(14),
LOC VARCHAR(13),
PRIMARY KEY (DEPTNO));
INSERT INTO DEPT VALUES (10,'SPORTS','NEW YORK');
INSERT INTO DEPT VALUES (20,'HOME','DALLAS');
INSERT INTO DEPT VALUES (30,'OUTDOOR','CHICAGO');
INSERT INTO DEPT VALUES (40,'CLOTHING','BOSTON');
CREATE TABLE EMP (
EMPNO INTEGER NOT NULL,
ENAME VARCHAR(10),
JOB VARCHAR(9),
MGR INTEGER,
SAL FLOAT,
COMM FLOAT,
DEPTNO INTEGER NOT NULL,
FOREIGN KEY (DEPTNO) REFERENCES DEPT (DEPTNO),
FOREIGN KEY (MGR) REFERENCES EMP(EMPNO),
PRIMARY KEY (EMPNO));
INSERT INTO EMP VALUES (7839,'KING','PRESIDENT',NULL,
5000,NULL,10);
INSERT INTO...
-- Schema definition
create table Customer (
cid smallint not null,
name varchar(20),
city varchar(15),
constraint customer_pk
primary key (cid)
);
create table Club (
club varchar(15) not null,
desc varchar(50),
constraint club_pk
primary key
(club)
);
create table Member (
club varchar(15) not null,
cid
smallint not null,
constraint member_pk
primary key (club,
cid),
constraint mem_fk_club
foreign key (club)
references Club,
constraint mem_fk_cust...
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