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Getting ERROR 1701, ERROR 1452 and ERROR 1305 errors in MySQL - Need some expertise
-- This sql script creates the structure.
-- of the rugby club database.

DROP DATABASE IF EXISTS database_rugby;

CREATE DATABASE database_rugby;

USE database_rugby;

-- Create the "coach" table.
DROP TABLE IF EXISTS `database_rugby`.`coach` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`coach` (
  `coachID` INT(5) NOT NULL ,
  `dateBeganCoaching` DATE NOT NULL ,
  `personID` INT(5) NOT NULL ,
  PRIMARY KEY (`coachID`))
ENGINE = InnoDB;


-- Create the "grade" table.
DROP TABLE IF EXISTS `database_rugby`.`grade` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`grade` (
  `gradeID` INT(5) NOT NULL AUTO_INCREMENT ,
  `gradeName` VARCHAR(50) NOT NULL ,
  `minWeight` INT(3) NOT NULL ,
  `maxWeight` INT(3) NOT NULL ,
  `minAge` INT(3) NOT NULL ,
  `maxAge` INT(3) NOT NULL ,
  `ballSize` INT(1) NOT NULL ,
  PRIMARY KEY (`gradeID`) )
ENGINE = InnoDB;


-- Create the "coachQualification" table.
DROP TABLE IF EXISTS `database_rugby`.`coachQualification` ;

CREATE  TABLE IF NOT EXISTS `database_rugby`.`coachQualification` (
  `qualID` INT(5) NOT NULL AUTO_INCREMENT ,
  `qualName` CHAR(5) NOT NULL ,
  `gradeID` INT(5) NOT NULL ,
  PRIMARY KEY (`qualID`) ,
  INDEX `gradeID` (`gradeID` ASC) ,
  CONSTRAINT `coachQualification_ibfk_1`
    FOREIGN KEY (`gradeID`)
    REFERENCES `database_rugby`.`grade` (`gradeID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;


-- Create the "parent" table.
DROP TABLE IF EXISTS `database_rugby`.`parent` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`parent` (
  `parentID` INT(5) NOT NULL ,
  `personID` INT(5) NOT NULL ,
  PRIMARY KEY (`parentID`))
ENGINE = InnoDB;


-- Create the "school" table.
DROP TABLE IF EXISTS `database_rugby`.`school` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`school` (
  `schoolID` INT(5) NOT NULL AUTO_INCREMENT ,
  `schoolName` VARCHAR(100) NOT NULL ,
  PRIMARY KEY (`schoolID`))
ENGINE = InnoDB;


-- Create the "player" table.
--
-- Inherits fields from the "person"
-- and "school" tables.
DROP TABLE IF EXISTS `database_rugby`.`player` ;

CREATE  TABLE IF NOT EXISTS `database_rugby`.`player` (
  `playerID` INT(5) NOT NULL ,
  `personID` INT(5) NOT NULL ,
  `schoolID` INT(5) NOT NULL ,
  PRIMARY KEY (`playerID`) ,
  INDEX `schoolID` (`schoolID` ASC) ,
  CONSTRAINT `player_ibfk_1`
    FOREIGN KEY (`schoolID`)
    REFERENCES `database_rugby`.`school` (`schoolID` )
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;


-- Create the "person" table.
--
-- This table has one:one relationships
-- with the parent, coach and player
-- tables.
DROP TABLE IF EXISTS `database_rugby`.`person` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`person` (
  `personID` INT(5) NOT NULL AUTO_INCREMENT ,
  `firstName` VARCHAR(50) NOT NULL ,
  `lastName` VARCHAR(50) NOT NULL ,
  `dateOfBirth` DATE NOT NULL ,
  `streetAddress` VARCHAR(150) NOT NULL ,
  `suburbAddress` VARCHAR(150) NULL DEFAULT NULL ,
  `cityAddress` VARCHAR(150) NOT NULL ,
  `photo` BLOB NULL DEFAULT NULL ,
  `parent_parentID` INT(5) NOT NULL DEFAULT '0' ,
  `coach_coachID` INT(5) NOT NULL DEFAULT '0' ,
  `player_playerID` INT(5) NOT NULL DEFAULT '0' ,
  `parent_parentID1` INT(5) NOT NULL DEFAULT '0' ,
  `player_playerID1` INT(5) NOT NULL DEFAULT '0' ,
  `coach_coachID1` INT(5) NOT NULL DEFAULT '0' ,
  `coach_coachID2` INT(5) NOT NULL DEFAULT '0' ,
  `parent_parentID2` INT(5) NOT NULL DEFAULT '0' ,
  `player_playerID2` INT(5) NOT NULL DEFAULT '0' ,
  PRIMARY KEY (`personID`) ,
  INDEX `fk_person_coach1` (`coach_coachID2` ASC) ,
  INDEX `fk_person_parent1` (`parent_parentID2` ASC) ,
  INDEX `fk_person_player1` (`player_playerID2` ASC) ,
  CONSTRAINT `fk_person_coach1`
    FOREIGN KEY (`coach_coachID2` )
    REFERENCES `database_rugby`.`coach` (`coachID`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_person_parent1`
    FOREIGN KEY (`parent_parentID2`)
    REFERENCES `database_rugby`.`parent` (`parentID`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_person_player1`
    FOREIGN KEY (`player_playerID2`)
    REFERENCES `database_rugby`.`player` (`playerID`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- Create the "homePhone" table.
DROP TABLE IF EXISTS `database_rugby`.`homePhone` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`homePhone` (
  `homePhoneID` INT(5) NOT NULL AUTO_INCREMENT ,
  `homeNumber` CHAR(9) NOT NULL ,
  PRIMARY KEY (`homePhoneID`))
ENGINE = InnoDB;


-- Create the "mobilePhone" table.
DROP TABLE IF EXISTS `database_rugby`.`mobilePhone` ;

CREATE  TABLE IF NOT EXISTS `database_rugby`.`mobilePhone` (
  `mobilePhoneID` INT(5) NOT NULL AUTO_INCREMENT ,
  `mobileNumber` CHAR(10) NULL DEFAULT NULL ,
  PRIMARY KEY (`mobilePhoneID`))
ENGINE = InnoDB;


-- Create the "emailAddress" table.
DROP TABLE IF EXISTS `database_rugby`.`emailAddress` ;

CREATE  TABLE IF NOT EXISTS `database_rugby`.`emailAddress` (
  `emailAddressID` INT(5) NOT NULL AUTO_INCREMENT ,
  `emailAddress` CHAR(10) NULL DEFAULT NULL ,
  PRIMARY KEY (`emailAddressID`))
ENGINE = InnoDB;


-- Create the "Contact" table
--
-- This is a linking table
-- that describes the many:many
-- relationships between "person"
-- and the "homePhone", "mobilePhone",
-- and "emailAddress" tables.
DROP TABLE IF EXISTS `database_rugby`.`contact` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`contact` (
  `personID` INT(5) NOT NULL ,
  `homePhoneID` INT(5) NOT NULL ,
  `mobilePhoneID` INT(5) NULL DEFAULT NULL ,
  `emailAddressID` INT(5) NULL DEFAULT NULL ,
  INDEX `personID` (`personID` ASC) ,
  INDEX `homePhoneID` (`homePhoneID` ASC) ,
  INDEX `mobilePhoneID` (`mobilePhoneID` ASC) ,
  INDEX `emailAddressID` (`emailAddressID` ASC) ,
  CONSTRAINT `contact_ibfk_1`
    FOREIGN KEY (`personID` )
    REFERENCES `database_rugby`.`person` (`personID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `contact_ibfk_2`
    FOREIGN KEY (`homePhoneID`)
    REFERENCES `database_rugby`.`homePhone` (`homePhoneID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `contact_ibfk_3`
    FOREIGN KEY (`mobilePhoneID`)
    REFERENCES `database_rugby`.`mobilePhone` (`mobilePhoneID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `contact_ibfk_4`
    FOREIGN KEY (`emailAddressID`)
    REFERENCES `database_rugby`.`emailAddress` (`emailAddressID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;


-- Create the "family" table.
--
-- This is a linking table
-- that describes the many:many
-- relationship between "parent"
-- and "player" tables.
DROP TABLE IF EXISTS `database_rugby`.`family` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`family` (
  `parentID` INT(5) NOT NULL ,
  `playerID` INT(5) NOT NULL ,
  `parent_parentID` INT(5) NOT NULL ,
  INDEX `playerID` (`playerID` ASC) ,
  INDEX `fk_family_parent1` (`parent_parentID` ASC) ,
  CONSTRAINT `family_ibfk_2`
    FOREIGN KEY (`playerID` )
    REFERENCES `database_rugby`.`player` (`playerID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `fk_family_parent1`
    FOREIGN KEY (`parent_parentID`)
    REFERENCES `database_rugby`.`parent` (`parentID`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- Create the "qualificationSet" table.
--
-- This is a linking table
-- that describes the many:many
-- relationship between "coach"
-- and "coachQualification" tables.
DROP TABLE IF EXISTS `database_rugby`.`qualificationSet` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`qualificationSet` (
  `coachID` INT(5) NOT NULL ,
  `qualID` INT(5) NOT NULL ,
  INDEX `coachID` (`coachID` ASC) ,
  INDEX `qualID` (`qualID` ASC) ,
  CONSTRAINT `qualificationSet_ibfk_1`
    FOREIGN KEY (`coachID`)
    REFERENCES `database_rugby`.`coach` (`coachID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `qualificationSet_ibfk_2`
    FOREIGN KEY (`qualID`)
    REFERENCES `database_rugby`.`coachQualification` (`qualID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;


-- Create the "team" table.
DROP TABLE IF EXISTS `database_rugby`.`team` ;
CREATE  TABLE IF NOT EXISTS `database_rugby`.`team` (
  `teamID` INT(5) NOT NULL AUTO_INCREMENT ,
  `teamName` VARCHAR(50) NOT NULL ,
  `teamYear` INT(2) NOT NULL ,
  `gradeID` INT(5) NOT NULL ,
  PRIMARY KEY (`teamID`) ,
  INDEX `gradeID` (`gradeID` ASC) ,
  CONSTRAINT `team_ibfk_1`
    FOREIGN KEY (`gradeID`)
    REFERENCES `database_rugby`.`grade` (`gradeID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;


-- Create the "teamAllocation" table
--
-- this is a linking table for a
-- many:many relationship between
-- team and player tables.
DROP TABLE IF EXISTS `database_rugby`.`teamAllocation` ;

CREATE  TABLE IF NOT EXISTS `database_rugby`.`teamAllocation` (
  `teamID` INT(5) NOT NULL ,
  `playerID` INT(5) NOT NULL ,
  INDEX `teamID` (`teamID` ASC) ,
  INDEX `playerID` (`playerID` ASC) ,
  CONSTRAINT `teamallocation_ibfk_1`
    FOREIGN KEY (`teamID` )
    REFERENCES `database_rugby`.`team` (`teamID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `teamAllocation_ibfk_2`
    FOREIGN KEY (`playerID`)
    REFERENCES `database_rugby`.`player` (`playerID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;


-- Create the "teamCoachAllocation" table.
--
-- This is a linking table
-- that describes the many:many
-- relationship between "coach"
-- and "team" tables.
DROP TABLE IF EXISTS `database_rugby`.`teamCoachAllocation` ;
CREATE TABLE `database_rugby`.`teamCoachAllocation` (
  `coachID` INT(5) NOT NULL ,
  `teamID` INT(5) NOT NULL ,
  INDEX `coachID` (`coachID` ASC) ,
  INDEX `teamID` (`teamID` ASC) ,
  CONSTRAINT `teamCoachAllocation_ibfk_1`
    FOREIGN KEY (`coachID`)
    REFERENCES `database_rugby`.`coach` (`coachID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `teamCoachAllocation_ibfk_2`
    FOREIGN KEY (`teamID`)
    REFERENCES `database_rugby`.`team` (`teamID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;

-- database_data.sql.
-- This sql script inserts data into the
-- rugby club database.

USE database_rugby;

TRUNCATE TABLE database_rugby.person;

-- Insert new persons which will be
-- players.
INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Michael",
"Peck",
'2002-12-10',
"45 Skibo Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Matt",
"Petersen",
'2001-06-15',
"192 Bayview Road",
"South Dunedin",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Christopher",
"Petersen",
'2003-02-19',
"192 Bayview Road",
"South Dunedin",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Richard",
"Michaels",
'2002-04-08',
"15 Fitzroy Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Shaun",
"Michaels",
'2003-11-11',
"15 Fitzroy Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Harry",
"Dackers",
'2004-02-11',
"32 Peter Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Daniel",
"Mitchell",
'2002-05-19',
"112 South Road",
"Caversham",
"Dunedin");

-- Insert new persons which will be
-- parents.
INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Gregory",
"Peck",
'1971-07-22',
"123 Burns Street",
"South Dunedin",
"Dunedin");


INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Laura",
"Peck",
'1979-09-08',
"123 Burns Street",
"South Dunedin",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Martha",
"Petersen",
'1973-12-07',
"192 Bayview Road",
"South Dunedin",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Chris",
"Michaels",
'1967-08-07',
"15 Fitzroy Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Nadine",
"Michaels",
'1973-10-19',
"15 Fitzroy Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Barry",
"Dackers",
'1965-02-11',
"32 Peter Street",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Kevin",
"Mitchell",
'1972-05-19',
"112 South Road",
"Caversham",
"Dunedin");

INSERT INTO database_rugby.person (
firstName,
lastName,
dateOfBirth,
streetAddress,
suburbAddress,
cityAddress)
VALUES(
"Rebecca",
"Mitchell",
'1978-01-23',
"112 South Road",
"Caversham",
"Dunedin");

-- Insert schools into school table.
TRUNCATE TABLE database_rugby.school;
INSERT INTO database_rugby.school(
schoolName)
VALUES(
"College Street School");

INSERT INTO database_rugby.school(
schoolName)
VALUES(
"Macandrew Intermediate School");

INSERT INTO database_rugby.school(
schoolName)
VALUES(
"Carlton Hill Primary");

INSERT INTO database_rugby.school(
schoolName)
VALUES(
"Caversham Primary School");

INSERT INTO database_rugby.school(
schoolName)
VALUES(
"Concord School");

-- Insert players into player table.
TRUNCATE TABLE database_rugby.player;
INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Michael"
    AND database_rugby.person(lastName) = "Peck"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "College Street School"));

INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Matt"
    AND database_rugby.person(lastName) = "Petersen"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "Macandrew Intermediate School"));

INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Christopher"
    AND database_rugby.person(lastName) = "Petersen"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "College Street School"));

INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Richard"
    AND database_rugby.person(lastName) = "Michaels"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "College Street School"));

INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Shaun"
    AND database_rugby.person(lastName) = "Michaels"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "College Street School"));

INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Harry"
    AND database_rugby.person(lastName) = "Dackers"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "Caversham Primary School"));

INSERT INTO database_rugby.player(
personID,
schoolID)
VALUES(
    (SELECT personID FROM database_rugby.person
    WHERE database_rugby.person(firstName) = "Daniel"
    AND database_rugby.person(lastName) = "Mitchell"),
    (SELECT schoolID FROM database_rugby.school
    WHERE database_rugby.school(schoolName) =  "Caversham Primary School"));

Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 82
Server version: 5.5.23 MySQL Community Server (GPL)

Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> source c:scriptsdatabase_schema.sql
Query OK, 16 rows affected (0.35 sec)

Query OK, 1 row affected (0.03 sec)

Database changed
Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.04 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.07 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.01 sec)

Query OK, 0 rows affected (0.09 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.01 sec)

Query OK, 0 rows affected (0.07 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.07 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.10 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.08 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.10 sec)

Query OK, 0 rows affected, 1 warning (0.01 sec)

Query OK, 0 rows affected (0.07 sec)

mysql> source c:scriptsdatabase_data.sql
Database changed
ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constrai
nt (`database_rugby`.`contact`, CONSTRAINT `contact_ibfk_1` FOREIGN KEY (`person
ID`) REFERENCES `database_rugby`.`person` (`personID`))
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint f
ails (`database_rugby`.`person`, CONSTRAINT `fk_person_coach1` FOREIGN KEY (`coa
ch_coachID2`) REFERENCES `coach` (`coachID`) ON DELETE NO ACTION ON UPDATE NO AC
TION)
ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constrai
nt (`database_rugby`.`player`, CONSTRAINT `player_ibfk_1` FOREIGN KEY (`schoolID
`) REFERENCES `database_rugby`.`school` (`schoolID`))
Query OK, 1 row affected (0.01 sec)

Query OK, 1 row affected (0.01 sec)

Query OK, 1 row affected (0.01 sec)

Query OK, 1 row affected (0.00 sec)

Query OK, 1 row affected (0.00 sec)

ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constrai
nt (`database_rugby`.`person`, CONSTRAINT `fk_person_player1` FOREIGN KEY (`play
er_playerID2`) REFERENCES `database_rugby`.`player` (`playerID`))
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
ERROR 1305 (42000): FUNCTION database_rugby.person does not exist
mysql>

SET foreign_key_checks = 0;

SET foreign_key_checks = 1;

-- Create the "person" table.
--
-- This table has one:one relationships
-- with the parent, coach and player
-- tables.
DROP TABLE IF EXISTS `person` ;                --- no change
CREATE TABLE `person` (
  `personID` INT(5) NOT NULL AUTO_INCREMENT ,
  --- ...
  --- several columns omitted for clarity
  --- ...
  PRIMARY KEY (`personID`))
ENGINE = InnoDB;

-- Create the "parent" table.
DROP TABLE IF EXISTS `parent` ;
CREATE TABLE `parent` (
  --- `parentID` INT(5) NOT NULL ,             --- removed

  `personID` INT(5) NOT NULL ,

  --- PRIMARY KEY (`parentID`, `personID`),    --- removed

  PRIMARY KEY (`personID`),                    --- this part only as PK
                                               --- which is also a FK
  FOREIGN KEY (`personID`)                     --- as previously (no change here)
    REFERENCES `person` (`personID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;

-- Create the "school" table.
-- omitted for clarity
--
--
-- Create the "player" table.
--
-- Inherits fields from the "person"
-- and "school" tables.
DROP TABLE IF EXISTS `player` ;
CREATE TABLE `player` (
  --- `playerID` INT(5) NOT NULL ,             --- removed
  `personID` INT(5) NOT NULL ,
  `schoolID` INT(5) NOT NULL ,
  PRIMARY KEY (`personID`),                    --- Primary Key
  FOREIGN KEY (`personID`)                     --- that is also Foreign Key
    REFERENCES `person` (`personID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  FOREIGN KEY (`schoolID`)
    REFERENCES `school` (`schoolID`)
    ON DELETE CASCADE
    ON UPDATE CASCADE)
ENGINE = InnoDB;