可以用这里的代码直接复制去创建head first SQL里的原始数据，然后再去操作。省去了敲原始数据的麻烦。
head first sql网站可下载源码 head first sql
上面这个打不开的话,可以用这个github 以下有些源码来至这里.
boys
CREATE TABLE `boys` (
`boy_id` int(11) default NULL,
`boy` varchar(20) default NULL,
`toy_id` int(11) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO `boys` (`boy_id`,`boy`,`toy_id`) VALUES ('1','Davey','3');
INSERT INTO `boys` (`boy_id`,`boy`,`toy_id`) VALUES ('2','Bobby','5');
INSERT INTO `boys` (`boy_id`,`boy`,`toy_id`) VALUES ('3','Beaver','2');
INSERT INTO `boys` (`boy_id`,`boy`,`toy_id`) VALUES ('4','Richie','1');
INSERT INTO `boys` (`boy_id`,`boy`,`toy_id`) VALUES ('6','Johnny','4');
INSERT INTO `boys` (`boy_id`,`boy`,`toy_id`) VALUES ('5','Billy','2');
toys
CREATE TABLE `toys` (
`toy_id` int(11) default NULL,
`toy` varchar(20) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('1','hula hoop');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('2','balsa glider');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('3','toy soldiers');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('4','harmonica');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('5','baseball cards');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('6','tinker toys');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('7','etch-a-sketch');
INSERT INTO `toys` (`toy_id`,`toy`) VALUES ('8','slinky');
my_contacts
CREATE TABLE `my_contacts` (
`last_name` varchar(30) ,
`first_name` varchar(20) ,
`email` varchar(50) ,
`gender` char(1),
`birthday` date ,
`profession` varchar(50),
`location` varchar(50),
`status` varchar(20),
`interests` varchar(100),
`seeking` varchar(100)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Anderson','Jillian','jill_anderson@ \nbreakneckpizza.com','F','1980-09-05','Technical Writer','Palo Alto, CA','single','kayaking, reptiles','relationship, friends');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Kenton','Leo','lkenton@starbuzzcoffee.com','M','1974-01-10','Manager','San Francisco, CA','divorced','women','women to date');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('McGavin','Darrin',' captainlove@headfirsttheater.com','M','1966-01-23','Cruise Ship Captain','San Diego, CA','single','sailing, fishing, yachting','women for casual relationships');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Franklin','Joe','joe_franklin@leapinlimos.com','M','1977-04-28','Software Sales','Dallas, TX','married','fishing, drinking','new job');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Hamilton','Jamie','dontbother@starbuzzcoffee.com','F','1964-09-10','System Administrator','Princeton, NJ','married','RPG','nothing');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Chevrolet','Maurice','bookman4u@objectville.net','M','1962-07-01','Bookshop Owner','Mountain View, CA','married','collecting books, scuba diving','friends');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Kroger','Renee','poorrenee@mightygumball.net','F','1976-12-03','Unemployed','San Francisco, CA','divorced','cooking','employment');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Mendoza','Angelina','angelina@starbuzzcoffee.com','F','1979-08-19','UNIX Sysadmin','San Francisco, CA','married','acting, dancing','new job');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Murphy','Donald','padraic@tikibeanlounge.com','M','1967-01-23','Computer Programmer','New York City, NY','committed relationsh','RPG, anime','friends');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`,`profession`,`location`,`status`,`interests`,`seeking`) VALUES ('Spatner','John','jpoet@objectville.net','M','1963-04-18','Salesman','Woodstock, NY','married','poetry, screenwriting','nothing');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`, `profession`,`location`) VALUES ('Toth','Anne','Anne_Toth@leapinlimos.com','F','1969-11-18', 'Artist','San Fran, CA');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`, `profession`,`location`) VALUES ('Manson','Anne','am86@objectville.net','F','1977-08-09', 'Baker','Seattle, WA');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`, `profession`,`location`) VALUES ('Hardy','Anne','anneh@b0tt0msup.com','F','1963-04-18', 'Teacher','San Fran, CA');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`, `profession`,`location`) VALUES ('Parker','Anne','annep@starbuzzcoffee.com','F','1983-01-10', 'Student','San Fran, CA');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`, `profession`,`location`) VALUES ('Blunt','Anne','anneblunt@breakneckpizza.com','F','1959-10-09', 'Web Designer','San Fran, CA');
INSERT INTO `my_contacts` (`last_name`,`first_name`,`email`,`gender`,`birthday`, `profession`,`location`) VALUES ('Jacobs','Anne','anne99@objectville.net','F','1968-02-05', 'Computer Programmer','San Jose, CA');
girls
CREATE TABLE `girls` (
`girl_id` int(11) default NULL,
`girl` varchar(20) default NULL,
`toy_id` int(11) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO `girls` (`girl_id`,`girl`,`toy_id`) VALUES ('1','Jane','3');
INSERT INTO `girls` (`girl_id`,`girl`,`toy_id`) VALUES ('2','Sally','4');
INSERT INTO `girls` (`girl_id`,`girl`,`toy_id`) VALUES ('3','Cindy','1');
INSERT INTO `girls` (`girl_id`,`girl`,`toy_id`) VALUES ('4','Mandy','1');
easy_drinks
CREATE TABLE easy_drinks
(
drink_name VARCHAR(30), main VARCHAR(30), amount1 DEC(4,2),
second VARCHAR(30), amount2 DEC(4,2), directions BLOB
);
INSERT INTO easy_drinks
VALUES
('Blackthorn', 'tonic', 1.5, 'pineapple juice', 1, 'shake with ice, pour out, decorate with lemon rind'),
('Blue Moon', 'soda', 1.5, 'blueberry juice', .75, 'shake with ice, pour out, decorate with lemon rind'),
('Here you are on', 'peachy nectar', 1, 'pineapple juice', 1, 'shake with ice, pour into glasses'),
('Lime fizzy', 'sprite', 1.5, 'lime juice', .75, 'shake with ice, pour out'),
('Kiss', 'cherry juice', 2, 'apricot nectar', 7, 'serve with ice and straw'),
('Hot Gold', 'peachy nectar', 3, 'orange juice', 6, 'pour hot orange juice into a mug,
add peachy nectar'),
('Lonely tree', 'soda', 1.5, 'cherry juice', .75, 'shake with ice, pour out'),
('Greyhound', 'soda', 1.5, 'grapefruit juice', 5, 'serve with ice, shake thoroughly'),
('Indian summer', 'apple juice', 2, 'hot tea', 6, 'pour the juice into a mug, add hot tea'),
('Frog', 'cold tea', 1.5, 'lemonade', 5, 'serve on ice with a slice of lime'),
('Soda plus', 'soda', 2, 'grape juice', 1, 'stir in a glass, serve without ice');
clown_info
CREATE TABLE `clown_info` (
`name` varchar(20) DEFAULT NULL,
`last_seen` varchar(50) DEFAULT NULL,
`appearance` varchar(256) DEFAULT NULL,
`activities` varchar(50) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO clown_info
VALUES
('Elsie', 'Cherry Hill House for the Elderly', 'W, red hair, green suit, huge shoes', 'balls, cars'),
('Pickles', 'Jack Green\'s Party', 'M, orange hair, blue suit, huge shoes', 'mime'),
('Snagles', 'Bolmart', 'W, yellow shirt, red pants', 'horn, umbrella'),
('Mr. Hobo', 'Circus BG', 'M, cigar, black hair, little hat', 'violin'),
('Clarabelle', 'Belmont\'s Nursing Home', 'W, pink hair, big flower, blue dress', 'chanting, dancing'),
('Scooter', 'Oakland Hospital', 'M, blue hair, red suit, big nose', 'balls'),
('Zippo', 'Milstown Shopping Center', 'W, orange suit, pants', 'dances'),
('Babe', 'Driving School Earl', 'W, pink suit with sparkles', 'balancing, cars'),
('Bonzo', NULL, 'M, women\'s polka-dot dress', 'singing, dancing'),
('Sniflyz', 'Tracy\'s Institution', 'M, green-purple suit, long nose', NULL);
INSERT INTO clown_info
VALUES
('Zippo', 'Milstown Shopping Center', 'W, orange suit, pants', 'dancing, singing'),
('Snagles', 'Bolmart', 'W, yellow shirt, blue pants', 'horn, umbrella'),
('Bonzo', 'Park Dixon', 'M, women\'s polka-dot dress', 'singing, dancing'),
('Sniffles', 'Tracy\'s Institution', 'M, green-purple suit, long nose', 'driving around'),
('Mr. Hobo', 'Eric Gray\'s Party', 'M, cigar, black hair, little hat', 'violin');
CREATE TABLE doughnuts_purchases
(
donut_type VARCHAR(20),
dozens INT,
topping VARCHAR(20),
price DEC(4,2)
);
INSERT INTO doughnuts_purchases
(donut_type, dozens, topping, price)
VALUES
('with jam', 3, 'sprinkles', 3.50);
SELECT drink_name, main, second
FROM easy_drinks
WHERE main = 'soda';
SELECT drink_name FROM easy_drinks WHERE main = 'cherry juice';
DELETE FROM clown_info
WHERE activities = 'dancing';
INSERT INTO clown_info
VALUES
('Clarabelle', 'Belmont's Nursing Home', 'F, pink hair, large flower, blue dress', 'dancing');
DELETE FROM clown_info
WHERE activities = 'chants, dances';
UPDATE clown_info
SET activities = 'dancing'
WHERE name = 'Zippo';
SELECT * FROM clown_info WHERE name = 'Snagles' AND appearance LIKE '%blue%';
SELECT * FROM clown_info WHERE name = 'Bonzo' AND last_seen = 'Park Dixon';
SELECT * FROM clown_info WHERE name = 'Sniffles' AND activities LIKE '%driving%';
SELECT * FROM clown_info WHERE name = 'Mr. Hobo' AND last_seen <> 'Circus BG';
CREATE TABLE my_contacts
(
contact_id INT NOT NULL AUTO_INCREMENT,
last_name VARCHAR(30) DEFAULT NULL,
first_name VARCHAR(20) DEFAULT NULL,
email VARCHAR(50) DEFAULT NULL,
gender CHAR(1) DEFAULT NULL,
birthday DATE DEFAULT NULL,
profession VARCHAR(50) DEFAULT NULL,
location VARCHAR(50) DEFAULT NULL,
status VARCHAR(20) DEFAULT NULL,
interests VARCHAR(100) DEFAULT NULL,
seeking VARCHAR(100) DEFAULT NULL,
PRIMARY KEY (contact_id)
);
CREATE TABLE your_table
(
id INT NOT NULL AUTO_INCREMENT,
first_name VARCHAR(30) NOT NULL,
last_name VARCHAR(30) NOT NULL,
PRIMARY KEY (id)
);
INSERT INTO your_table
(id, first_name, last_name)
VALUES
(NULL, 'Marcia', 'Brady');
ALTER TABLE my_contacts
ADD COLUMN contact_id INT NOT NULL AUTO_INCREMENT FIRST,
ADD PRIMARY KEY (contact_id);
ALTER TABLE projekts
RENAME TO project_list;
ALTER TABLE project_list
CHANGE COLUMN number proj_id INT NOT NULL AUTO_INCREMENT,
ADD PRIMARY KEY (proj_id);
ALTER TABLE project_list
CHANGE COLUMN description proj_desc VARCHAR(150),
CHANGE COLUMN contract con_name VARCHAR(30);
ALTER TABLE project_list
ADD COLUMN con_phone VARCHAR(15),
ADD COLUMN start_date DATE,
ADD COLUMN est_cost DEC(8,2);
CREATE TABLE hooptie
(
color VARCHAR(30),
'year' INT,
make VARCHAR(20),
mo VARCHAR(15),
howmuch DEC(8,2);
INSERT INTO hooptie
VALUES
('silver', 1998, 'Porsche', 'Boxter', 17992.54),
(NULL, 2000, 'Jaguar', 'XJ', 15995),
('red', 2002, 'Cadillac', 'Escalade', 40215.9);
ALTER TABLE hooptie
RENAME TO car_table;
ALTER TABLE car_table
ADD COLUMN car_id INT NOT NULL AUTO_INCREMENT FIRST,
ADD PRIMARY KEY(car_id);
ALTER TABLE car_table
ADD COLUMN VIN VARCHAR(20) AFTER car_id;
ALTER TABLE car_table
CHANGE COLUMN mo model VARCHAR(35);
ALTER TABLE car_table
CHANGE COLUMN howmuch price DEC(7,2);
ALTER TABLE my_contacts
ADD COLUMN city VARCHAR(40) AFTER profession,
ADD COLUMN state CHAR(2) AFTER location;
SELECT RIGHT(location, 2) FROM my_contacts;
SELECT SUBSTRING_INDEX(location, ', ', 1) FROM my_contacts;
UPDATE my_contacts
SET state = RIGHT(location, 2);
UPDATE my_contacts
SET city = SUBSTRING_INDEX(location, ', ', 1);
CREATE TABLE test_chars
(chars_id INT NOT NULL AUTO_INCREMENT, chars CHAR(1), PRIMARY KEY(chars_id));
INSERT INTO test_chars
(chars)
VALUES
('0'), ('1'), ('2'), ('3'), ('A'), ('B'), ('C'), ('D'), ('a'), ('b'), ('c'), ('d'),
('!'), ('@'), ('#'), ('$'), ('%'), ('^'), ('&'), ('*'), ('('), (')'), ('-'), ('_'),
('+'), ('='), ('['), (']'), ('{'), ('}'), (';'), (':'), (''''), ('"'), ('\\'), ('|'),
('`'), ('~'), (','), ('.'), ('<'), ('>'), ('/'), ('?'), (' '), (NULL);
SELECT chars_id, chars
FROM test_chars
ORDER BY title;
CREATE TABLE cookie_sales
(ID INT NOT NULL AUTO_INCREMENT, first_name VARCHAR(20), sales DEC(7,2), sales_date DATE, PRIMARY KEY(ID));
INSERT INTO cookie_sales
(first_name, sales, sales_date)
VALUES
('Lindsey', 32.02, '2007-03-06'), ('Paris', 26.53, '2007-03-06'), ('Britney', 11.25, '2007-03-06'),
('Nicole', 18.96, '2007-03-06'), ('Lindsey', 9.16, '2007-03-07'), ('Paris', 1.52, '2007-03-07'),
('Britney', 43.21, '2007-03-07'), ('Nicole', 8.05, '2007-03-07'), ('Lindsey', 17.62, '2007-03-08'),
('Paris', 24.19, '2007-03-08'), ('Britney', 3.40, '2007-03-08'), ('Nicole', 15.21, '2007-03-08'),
('Lindsey', 0, '2007-03-09'), ('Paris', 31.99, '2007-03-09'), ('Britney', 2.58, '2007-03-09'),
('Nicole', 0, '2007-03-09'), ('Lindsey', 2.34, '2007-03-10'), ('Paris', 13.44, '2007-03-10'),
('Britney', 8.78, '2007-03-10'), ('Nicole', 26.82, '2007-03-10'), ('Lindsey', 3.71, '2007-03-11'),
('Paris', 0.56, '2007-03-11'), ('Britney', 34.19, '2007-03-11'), ('Nicole', 7.77, '2007-03-11'),
('Lindsey', 16.23, '2007-03-12'), ('Paris', 0, '2007-03-12'), ('Britney', 4.50, '2007-03-12'),
('Nicole', 19.22, '2007-03-12');
SELECT SUM(sales)
FROM cookie_sales
WHERE first_name = 'Nicole';
SELECT first_name, SUM(sales)
FROM cookie_sales
GROUP BY first_name
ORDER BY SUM(sales) DESC;
SELECT first_name, COUNT(sales_date)
FROM cookie_sales
GROUP BY first_name;
SELECT DISTINCT sales_date
FROM cookie_sales
ORDER BY sales_date;
SELECT first_name, COUNT(DISTINCT sales_date)
FROM cookie_sales
GROUP BY first_name;
SELECT first_name, SUM(sales)
FROM cookie_sales
GROUP BY first_name
ORDER BY SUM(sales) DESC
LIMIT 1,1;
INSERT INTO my_contacts
VALUES
(NULL, 'Mur', 'Najdgel', '5552311111', 'nigelmoore@ranchersrule.com', 'M',
'1975-08-28', 'Farmer', 'Austin', 'TX', 'Not married', 'animals, horses, cinema',
'Unmarried woman'),
(NULL, 'Fiore', 'Karla', '5557894855', 'cfiore@fioreanimalclinic.com', 'W',
'1974-01-07', 'Vet', 'Round Rock', 'TX', 'Not married',
'horses, cinema, animals, detectives, tourism', 'Lonely man'),
(NULL, 'Salivan', 'Redji', '5552311122', 'me@kathieleeisaflake.com', 'M',
'1955-03-20', 'Comedian', 'Cambridge', 'MA', 'Not married',
'animals, collectible cards, geo-search', 'Woman'),
(NULL, 'Fergusson', 'Aleksis', '5550983476', 'alexangel@yahoo.com', 'W',
'1956-09-19', 'Painter', 'Pflugerville', 'MA', 'Not married',
'animals', 'Man');
UPDATE my_contacts
SET birthday = '1975-08-28'
WHERE contact_id = 3;
ALTER TABLE my_contacts
ADD COLUMN interest4 VARCHAR(40) AFTER interests,
ADD COLUMN interest3 VARCHAR(40) AFTER interests,
ADD COLUMN interest2 VARCHAR(40) AFTER interests,
ADD COLUMN interest1 VARCHAR(40) AFTER interests;
UPDATE my_contacts
SET interest1 = SUBSTRING_INDEX(interests, ',', 1);
SELECT LTRIM(RIGHT(interests, (CHAR_LENGTH(interests) - CHAR_LENGTH(interest1) - 1))) FROM my_contacts;
UPDATE my_contacts
SET interests = LTRIM(RIGHT(interests, (CHAR_LENGTH(interests) - CHAR_LENGTH(interest1) - 1)));
UPDATE my_contacts
SET interest2 = SUBSTRING_INDEX(interests, ',', 1);
UPDATE my_contacts
SET interests = LTRIM(RIGHT(interests, (CHAR_LENGTH(interests) - CHAR_LENGTH(interest2) - 1)));
UPDATE my_contacts
SET interest3 = SUBSTRING_INDEX(interests, ',', 1);
UPDATE my_contacts
SET interests = LTRIM(RIGHT(interests, (CHAR_LENGTH(interests) - CHAR_LENGTH(interest3) - 1)));
UPDATE my_contacts
SET interest4 = SUBSTRING_INDEX(interests, ',', 1);
ALTER TABLE my_contacts
DROP COLUMN interests;
CREATE TABLE interests
(
int_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
interest VARCHAR(50) NOT NULL,
cont_id INT NOT NULL,
CONSTRAINT my_contacts_contact_id_fk
FOREIGN KEY (cont_id)
REFERENCES my_contacts (contact_id)
);
CREATE TABLE profession
(
prof_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
profession VARCHAR(30)
)
AS
SELECT profession FROM my_contacts
GROUP BY profession
ORDER BY profession
;
SELECT DISTINCT seeking FROM my_contacts
ORDER BY seeking;
INSERT INTO toys (toy)
VALUES ('hoop'), ('plane'), ('soldiers'), ('harmonica'), ('baseball cards');
SELECT t.toy, b.boy
FROM toys t, boys b
SELECT b.boy, t.toy
FROM boys b INNER JOIN toys t
ON b.toy_id = t.toy_id;
alter table my_contacts
add column prof_id INT;
update my_contacts, profession
set my_contacts.prof_id = profession.prof_id
where my_contacts.profession = profession.profession;
alter table my_contacts
add constraint profession_prof_id_fk
foreign key(prof_id)
references profession(prof_id);
CREATE TABLE zip_code
(
zip_code INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
city VARCHAR(30),
state CHAR(2)
);
INSERT INTO zip_code (city)
SELECT city FROM my_contacts
GROUP BY city
ORDER BY city;
UPDATE my_contacts, zip_code
SET zip_code.state = my_contacts.state
WHERE my_contacts.city = zip_code.city;
ALTER TABLE my_contacts
ADD COLUMN zip_code INT;
UPDATE my_contacts, zip_code
SET my_contacts.zip_code = zip_code.zip_code
WHERE my_contacts.city = zip_code.city;
SELECT seeking.seeking_id
FROM my_contacts NATURAL JOIN seeking;
CREATE TABLE contact_seeking
(
contact_id INT
)
AS
SELECT contact_id FROM my_contacts
ORDER BY contact_id
;
ALTER TABLE contact_seeking
ADD COLUMN seeking_id INT;
UPDATE contact_seeking t1, (SELECT my_contacts.contact_id, seeking.seeking_id
FROM my_contacts NATURAL JOIN seeking) t2
SET t1.seeking_id = t2.seeking_id
WHERE t1.contact_id = t2.contact_id;
ALTER TABLE contact_seeking
ADD CONSTRAINT my_contacts_contact_id_fk
FOREIGN KEY(contact_id)
REFERENCES my_contacts(contact_id),
ADD CONSTRAINT seeking_seeking_id_fk
FOREIGN KEY(seeking_id)
REFERENCES seeking(seeking_id);
CREATE TABLE interests
(
interest_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
interest VARCHAR(40)
)
AS
SELECT LOWER(my_contacts.interest1) interest FROM my_contacts
WHERE interest1 <> ''
UNION
SELECT LOWER(my_contacts.interest2) interest FROM my_contacts
WHERE interest2 <> ''
UNION
SELECT LOWER(my_contacts.interest3) interest FROM my_contacts
WHERE interest3 <> ''
UNION
SELECT LOWER(my_contacts.interest4) interest FROM my_contacts
WHERE interest4 <> ''
ORDER BY interest;
CREATE TABLE contact_interest
(
contact_id INT,
interest_id INT
)
AS
SELECT * FROM (SELECT my_contacts.contact_id, interests.interest_id
FROM
my_contacts INNER JOIN interests
ON my_contacts.interest1 = interests.interest) contact_interest1
UNION ALL
SELECT * FROM (SELECT my_contacts.contact_id, interests.interest_id
FROM
my_contacts INNER JOIN interests ON my_contacts.interest2 = interests.interest) contact_interest2
UNION ALL
SELECT * FROM (SELECT my_contacts.contact_id, interests.interest_id
FROM
my_contacts INNER JOIN interests ON my_contacts.interest3 = interests.interest) contact_interest3
UNION ALL
SELECT * FROM (SELECT my_contacts.contact_id, interests.interest_id
FROM
my_contacts INNER JOIN interests
ON my_contacts.interest4 = interests.interest) contact_interest4
ORDER BY contact_id;
ALTER TABLE contact_interest
ADD CONSTRAINT my_contacts_contact_id_fk1
FOREIGN KEY(contact_id)
REFERENCES my_contacts(contact_id),
ADD CONSTRAINT interests_interest_id_fk
FOREIGN KEY(interest_id)
REFERENCES interests(interest_id);
CREATE TABLE job_current
(
contact_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
title VARCHAR(30),
salary DEC(8,2),
start_date DATE
);
ALTER TABLE job_current
ADD CONSTRAINT my_contacts_contact_id_fk2
FOREIGN KEY(contact_id)
REFERENCES my_contacts(contact_id);
INSERT INTO job_current
VALUES
(4, 'Vet', 3500, '2015/01/25'),
(14, 'Farmer', 4500, '2016/02/20'),
(1, 'Writer', 7500, '2010/11/04'),
(6, 'Painter', 5000.50, '2012/07/14');
CREATE TABLE job_desired
(
contact_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
title VARCHAR(30),
salary_low DEC(8,2),
salary_high DEC(8,2),
available CHAR(1),
years_exp DEC(3,1)
);
ALTER TABLE job_desired
ADD CONSTRAINT my_contacts_contact_id_fk3
FOREIGN KEY(contact_id)
REFERENCES my_contacts(contact_id);
CREATE TABLE job_listings
(
job_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
title VARCHAR(30),
salary DEC(8,2),
zip VARCHAR(20),
description VARCHAR(255)
);
CREATE VIEW gender_w AS
SELECT first_name, last_name, phone FROM my_contacts
WHERE gender = 'W';
CREATE VIEW job_raises AS
SELECT mc.first_name firstname, mc.last_name lastname, mc.email email, mc.phone phone,
jc.salary salary, jd.salary_low salarylow, (jd.salary_low - salary) raise
FROM my_contacts mc NATURAL JOIN job_current jc
INNER JOIN job_desired jd
ON jc.contact_id = jd.contact_id;
START TRANSACTION;
SELECT * FROM piggy_bank;
UPDATE piggy_bank SET coin = 'Q' WHERE coin = 'P';
SELECT * FROM piggy_bank;
ROLLBACK;
SELECT * FROM piggy_bank;
SET PASSWORD FOR 'root'@'localhost' = '***...';
CREATE USER frank, jim, joe IDENTIFIED BY '123';
GRANT SELECT ON gregs_list.* TO joe;
GRANT SELECT, INSERT, UPDATE ON gregs_list.* TO jim;
GRANT SELECT ON gregs_list.* TO frank;
GRANT DELETE ON job_listings TO frank;
