創建視圖跨越多個表

我想在MySQL中創建一個視圖，顯示一個球員的名字，他們的監護人姓名，監護人電話號碼和球員英寸創建視圖跨越多個表

扮演球隊我有這個腳本創建數據庫：

DROP TABLE IF EXISTS TeamCoach; 
DROP TABLE IF EXISTS TeamPlayer; 
DROP TABLE IF EXISTS CoachQualification; 
DROP TABLE IF EXISTS PlayerGuardian; 
DROP TABLE IF EXISTS PersonAddress; 
DROP TABLE IF EXISTS PersonPhoneNumber; 
DROP TABLE IF EXISTS Coach; 
DROP TABLE IF EXISTS Player; 
DROP TABLE IF EXISTS Qualification; 
DROP TABLE IF EXISTS Team; 
DROP TABLE IF EXISTS PhoneNumber; 
DROP TABLE IF EXISTS School; 
DROP TABLE IF EXISTS Person; 
DROP TABLE IF EXISTS Address; 
DROP TABLE IF EXISTS Guardian; 
DROP FUNCTION IF EXISTS TeamSize; 

CREATE TABLE Qualification (
qualificationID int NOT NULL AUTO_INCREMENT, 
name varchar(30) NOT NULL, 
level int NOT NULL, 
PRIMARY KEY (qualificationID) 
) ENGINE=InnoDB; 

CREATE TABLE Team (
teamID int NOT NULL AUTO_INCREMENT, 
name varchar(30) NOT NULL, 
ageGroup varchar(30) NOT NULL, 
year int NOT NULL, 
PRIMARY KEY (teamID) 
) ENGINE=InnoDB; 

CREATE TABLE Address (
addressID int NOT NULL AUTO_INCREMENT, 
number int NOT NULL, 
street varchar(30) NOT NULL, 
suburb varchar(30) NOT NULL, 
townCity varchar(30) NOT NULL, 
PRIMARY KEY (addressID) 
) ENGINE=InnoDB; 

CREATE TABLE PhoneNumber (
phoneNumberID int NOT NULL AUTO_INCREMENT, 
number varchar(20) NOT NULL, 
PRIMARY KEY (phoneNumberID) 
) ENGINE=InnoDB; 

CREATE TABLE School (
schoolID int NOT NULL AUTO_INCREMENT, 
name varchar(30) NOT NULL, 
PRIMARY KEY (schoolID) 
) ENGINE=InnoDB; 

CREATE TABLE Person (
personID int NOT NULL AUTO_INCREMENT, 
name varchar(30) NOT NULL, 
email varchar(30) NOT NULL, 
photo varchar(30) NOT NULL, 
PRIMARY KEY (personID) 
) ENGINE=InnoDB; 

CREATE TABLE PersonAddress (
personID int NOT NULL, 
addressID int NOT NULL, 
KEY personID (personID), 
KEY addressID (addressID), 
FOREIGN KEY (personID) REFERENCES Person (personID), 
FOREIGN KEY (addressID) REFERENCES Address (addressID) 
) ENGINE=InnoDB; 

CREATE TABLE PersonPhoneNumber (
personID int NOT NULL, 
phoneNumberID int NOT NULL, 
KEY personID (personID), 
KEY phoneNumberID (phoneNumberID), 
FOREIGN KEY (personID) REFERENCES Person (personID), 
FOREIGN KEY (phoneNumberID) REFERENCES PhoneNumber (phoneNumberID) 
) ENGINE=InnoDB; 

CREATE TABLE Coach (
coachID int NOT NULL PRIMARY KEY REFERENCES Person (personID), 
dateBeganCoaching varchar(10) NOT NULL 
) ENGINE=InnoDB; 

CREATE TABLE Player (
playerID int NOT NULL PRIMARY KEY REFERENCES Person (personID), 
DOB varchar(10) NOT NULL, 
schoolID int NOT NULL, 
KEY schoolID (schoolID), 
FOREIGN KEY (schoolID) REFERENCES School (schoolID) 
) ENGINE=InnoDB; 

CREATE TABLE Guardian (
guardianID int NOT NULL PRIMARY KEY REFERENCES Person (personID) 
)ENGINE=InnoDB; 

CREATE TABLE PlayerGuardian (
guardianID int NOT NULL, 
playerID int NOT NULL, 
KEY guardianID (guardianID), 
KEY playerID (playerID), 
FOREIGN KEY (guardianID) REFERENCES Guardian (guardianID), 
FOREIGN KEY (playerID) REFERENCES Player (playerID) 
) ENGINE=InnoDB; 

CREATE TABLE TeamPlayer (
teamID int NOT NULL, 
playerID int NOT NULL, 
KEY teamID (teamID), 
KEY playerID (playerID), 
FOREIGN KEY (teamID) REFERENCES Team (teamID), 
FOREIGN KEY (playerID) REFERENCES Player (playerID) 
) ENGINE=InnoDB; 

CREATE TABLE TeamCoach (
teamID int NOT NULL, 
coachID int NOT NULL, 
KEY teamID (teamID), 
KEY coachID (coachID), 
FOREIGN KEY (teamID) REFERENCES Team (teamID), 
FOREIGN KEY (coachID) REFERENCES Coach (coachID) 
) ENGINE=InnoDB; 

CREATE TABLE CoachQualification (
coachID int NOT NULL, 
qualificationID int NOT NULL, 
KEY coachID (coachID), 
KEY qualificationID (qualificationID), 
FOREIGN KEY (coachID) REFERENCES Coach (coachID), 
FOREIGN KEY (qualificationID) REFERENCES Qualification (qualificationID) 
) ENGINE=InnoDB; 

DELIMITER // 
CREATE FUNCTION TeamSize(Team varchar(30)) 
RETURNS int 
DETERMINISTIC CONTAINS SQL 
BEGIN 
DECLARE Size int; 
SELECT COUNT(*) INTO Size FROM ((
SELECT * FROM TeamPlayer WHERE teamID=(
SELECT teamID FROM Team WHERE name='Red Bulls')))AS TeamSize; 
RETURN Size; 
END // 
DELIMITER ;

而這種腳本與數據填充它：

INSERT INTO Qualification (name, level) VALUES ('Under 7s', '3'); 
INSERT INTO Qualification (name, level) VALUES ('Under 8s', '1'); 
INSERT INTO Qualification (name, level) VALUES ('Under 9s', '5'); 
INSERT INTO Qualification (name, level) VALUES ('Under 10s', '4'); 
INSERT INTO Qualification (name, level) VALUES ('Under 80s', '10'); 

INSERT INTO Team (name, ageGroup, year) VALUES ('Blue Hawks', 'Under 7s', '2015'); 
INSERT INTO Team (name, ageGroup, year) VALUES ('Yellow Dolphins', 'Under 8s', '2013'); 
INSERT INTO Team (name, ageGroup, year) VALUES ('Red Bulls', 'Under 9s', '2014'); 
INSERT INTO Team (name, ageGroup, year) VALUES ('Turquiose Turtles', 'Under 10s', '2015'); 
INSERT INTO Team (name, ageGroup, year) VALUES ('Violet Butterflies', 'Under 80s', '2015'); 

INSERT INTO Address (number, street, suburb, townCity) VALUES ('6', 'Selwyn Street', 'North East Valley', 'Dunedin'); 
INSERT INTO Address (number, street, suburb, townCity) VALUES ('6', 'Inverleith Street', 'Woodhaugh', 'Dunedin'); 
INSERT INTO Address (number, street, suburb, townCity) VALUES ('40', 'Chaucer Street', 'Milton', 'Milton'); 
INSERT INTO Address (number, street, suburb, townCity) VALUES ('105', 'Inniscort Street', 'Decent Part', 'Cromwell'); 
INSERT INTO Address (number, street, suburb, townCity) VALUES ('43', 'Chambers Street', 'North East Valley', 'Dunedin'); 

INSERT INTO PhoneNumber (number) VALUES ('034178669'); 
INSERT INTO PhoneNumber (number) VALUES ('0272637393'); 
INSERT INTO PhoneNumber (number) VALUES ('0277147957'); 
INSERT INTO PhoneNumber (number) VALUES ('0220826217'); 
INSERT INTO PhoneNumber (number) VALUES ('0800838383'); 

INSERT INTO School (name) VALUES ('Tokomairiro High'); 
INSERT INTO School (name) VALUES ('Cromwell College'); 
INSERT INTO School (name) VALUES ('Otago Boys'); 
INSERT INTO School (name) VALUES ('Otago Girls'); 
INSERT INTO School (name) VALUES ('Woodhaugh Rest Palace'); 

INSERT INTO Person (name, email, photo) VALUES ('Andrew Fletcher', '[email protected]', 'puppy.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Sam Bates', '[email protected]', 'kitten.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Mason Osbourne', '[email protected]', 'cheetah.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Zara DeMontgomery', '[email protected]', 'elephant.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Reuben Crimp', '[email protected]', 'dolphins.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Joy Gasson', '[email protected]', 'owl.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Brian Treanor', '[email protected]', 'whale.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Dale Parsons', '[email protected]', 'swordfish.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Tom Clark', '[email protected]', 'lion.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Jim Beam', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Jack Daniels', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('John Snow', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Ned Stark', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Tywin Lannister', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Hodor Hodor', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Joe Bloggs', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('John Doe', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Jane Doe', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Lassie Dog', '[email protected]', 'monkey.jpg'); 
INSERT INTO Person (name, email, photo) VALUES ('Jake Sully', '[email protected]', 'monkey.jpg'); 

INSERT INTO PersonAddress (personID, addressID) VALUES ('1', '3'); 
INSERT INTO PersonAddress (personID, addressID) VALUES ('2', '4'); 
INSERT INTO PersonAddress (personID, addressID) VALUES ('3', '5'); 
INSERT INTO PersonAddress (personID, addressID) VALUES ('4', '3'); 
INSERT INTO PersonAddress (personID, addressID) VALUES ('5', '2'); 

INSERT INTO PersonPhoneNumber (personID, phoneNumberID) VALUES ('1', '2'); 
INSERT INTO PersonPhoneNumber (personID, phoneNumberID) VALUES ('2', '4'); 
INSERT INTO PersonPhoneNumber (personID, phoneNumberID) VALUES ('3', '1'); 
INSERT INTO PersonPhoneNumber (personID, phoneNumberID) VALUES ('4', '5'); 
INSERT INTO PersonPhoneNumber (personID, phoneNumberID) VALUES ('5', '3'); 

INSERT INTO Coach (coachID, dateBeganCoaching) VALUES ('6', '2014'); 
INSERT INTO Coach (coachID, dateBeganCoaching) VALUES ('7', '2013'); 
INSERT INTO Coach (coachID, dateBeganCoaching) VALUES ('8', '2012'); 
INSERT INTO Coach (coachID, dateBeganCoaching) VALUES ('9', '2014'); 
INSERT INTO Coach (coachID, dateBeganCoaching) VALUES ('10', '1993'); 

INSERT INTO Player (playerID, DOB, schoolID) VALUES ('1', '08/07/1993', '1'); 
INSERT INTO Player (playerID, DOB, schoolID) VALUES ('2', '02/06/1993', '2'); 
INSERT INTO Player (playerID, DOB, schoolID) VALUES ('3', '08/04/1995', '1'); 
INSERT INTO Player (playerID, DOB, schoolID) VALUES ('4', '08/01/1994', '1'); 
INSERT INTO Player (playerID, DOB, schoolID) VALUES ('5', '25/12/1992', '5'); 
INSERT INTO Player (playerID, DOB, SchoolID) VALUES ('11', '06/07/1998', '3'); 
INSERT INTO Player (playerID, DOB, SchoolID) VALUES ('12', '06/07/1998', '3'); 
INSERT INTO Player (playerID, DOB, SchoolID) VALUES ('13', '06/07/1998', '4'); 
INSERT INTO Player (playerID, DOB, SchoolID) VALUES ('14', '06/07/1998', '5'); 
INSERT INTO Player (playerID, DOB, SchoolID) VALUES ('15', '06/07/1998', '4'); 

INSERT INTO Guardian (guardianID) VALUES ('16'); 
INSERT INTO Guardian (guardianID) VALUES ('17'); 
INSERT INTO Guardian (guardianID) VALUES ('18'); 
INSERT INTO Guardian (guardianID) VALUES ('19'); 
INSERT INTO Guardian (guardianID) VALUES ('20'); 

INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('16', '1'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('16', '2'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('17', '3'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('17', '4'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('18', '5'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('18', '11'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('19', '12'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('19', '13'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('20', '14'); 
INSERT INTO PlayerGuardian (guardianID, playerID) VALUES ('20', '15'); 

INSERT INTO TeamPlayer (teamID, playerID) VALUES ('1', '1'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('2', '2'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('3', '3'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('4', '4'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('5', '5'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('2', '11'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('4', '12'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('4', '13'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('3', '14'); 
INSERT INTO TeamPlayer (teamID, playerID) VALUES ('5', '15'); 

INSERT INTO TeamCoach (teamID, coachID) VALUES ('1', '6'); 
INSERT INTO TeamCoach (teamID, coachID) VALUES ('2', '7'); 
INSERT INTO TeamCoach (teamID, coachID) VALUES ('3', '8'); 
INSERT INTO TeamCoach (teamID, coachID) VALUES ('4', '9'); 
INSERT INTO TeamCoach (teamID, coachID) VALUES ('5', '10'); 

INSERT INTO CoachQualification (coachID, qualificationID) VALUES ('6', '5'); 
INSERT INTO CoachQualification (coachID, qualificationID) VALUES ('7', '4'); 
INSERT INTO CoachQualification (coachID, qualificationID) VALUES ('8', '3'); 
INSERT INTO CoachQualification (coachID, qualificationID) VALUES ('9', '2'); 
INSERT INTO CoachQualification (coachID, qualificationID) VALUES ('10', '1');

正是我試圖做甚至可能嗎？

來源

2015-06-07 Fezch

是的，這是可能的。首先嚐試編寫你想要的查詢。然後用它來創建視圖 –

玩家是否可以有多個監護人？ – FrankerZ

玩家可以有多個監護人，監護人可以有多個玩家。 – Fezch

我試圖創建一個適用於你的數據的查詢，但這是假設你對每個玩家只有一個監護人（你在評論中說過這是不可能的）。 Here是SQLFiddle，如果您想更多地使用它。

SELECT p.name, pg.name AS `GuardianName`, pgpn.`number` AS `GuardianNumber` 
FROM `Player` play 
LEFT JOIN `Person` p ON play.playerID = p.personID 
LEFT JOIN `PlayerGuardian` g ON play.playerID = g.playerID 
LEFT JOIN `Person` pg ON g.guardianID = pg.personID 
LEFT JOIN `PersonPhoneNumber` pgppn ON pg.personID = pgppn.personID 
LEFT JOIN `PhoneNumber` pgpn ON pgpn.phoneNumberID = pgppn.phoneNumberID

你遇到的問題是，你如何爲每個玩家顯示多個監護人？你想讓玩家多次出現該玩家擁有的每個監護人嗎？那麼你不得不擔心編碼級別的分組，這可能是一個很大的麻煩。

我的推薦：使用類似於CakePHP的ORM，它可以爲您完成繁重的工作。你建立了表格之間的關係，並且它將在多個有效的查詢中爲你連接它們。

來源

2015-06-07 07:51:30 FrankerZ

這個效果很好。爲什麼在其他JOIN中使用LEFT JOIN？ – Fezch

您可以在連接的[此處]（http://www.w3schools.com/sql/sql_join.asp）中看到不同之處。點擊每一章查看不同的連接，以及它們的用途。 LEFT JOIN基本上試圖連接來自備用表的數據，如果它不存在，它將返回空數據。請注意，這個查詢沒有考慮到多個監護人（在這種情況下，它只會返回一行）。 – FrankerZ

創建視圖跨越多個表

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