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09-07-09, 01:01
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Registered User
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Join Date: Sep 2009
Posts: 1
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need opinion in my resume db design
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Hi all this is going to be my first db, its a simple teachers' resume db and I hope to do it right, I just need to know if I am going through the right path here designing this db and what would you suggest to improve the design and what mistakes I may have done?
Code:
-- -----------------------------------------------------
-- Table `mydb`.`subject`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`subject` (
`idsubject` INT NOT NULL ,
`subject` VARCHAR(45) NULL ,
PRIMARY KEY (`idsubject`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`grade`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`grade` (
`idgrade` INT NOT NULL ,
`grade` INT NOT NULL ,
PRIMARY KEY (`idgrade`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`subject_grade`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`subject_grade` (
`idsubject` INT NOT NULL ,
`idgrade` INT NOT NULL ,
`idteacher` INT NULL ,
PRIMARY KEY (`idsubject`, `idgrade`) ,
INDEX `fk_subject_grade_subject1` (`idsubject` ASC) ,
INDEX `fk_subject_grade_grade1` (`idgrade` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`teacher`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`teacher` (
`idteacher` INT NOT NULL ,
`name` VARCHAR(45) NULL ,
`gender` VARCHAR(45) NULL ,
`birthdate` DATE NULL ,
`placeofbirth` VARCHAR(45) NULL ,
`marital_status` VARCHAR(45) NULL ,
`military_status` VARCHAR(45) NULL ,
PRIMARY KEY (`idteacher`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`email`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`email` (
`idteacher` INT NOT NULL ,
`email` VARCHAR(45) NOT NULL ,
PRIMARY KEY (`email`) ,
INDEX `fk_email_teacher1` (`idteacher` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`phone`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`phone` (
`idphone` INT NOT NULL ,
`idteacher` INT NULL ,
`phone` VARCHAR(45) NULL ,
`cellphone` VARCHAR(45) NULL ,
PRIMARY KEY (`idphone`) ,
INDEX `fk_phone_teacher1` (`idteacher` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`district`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`district` (
`iddistrict` INT NOT NULL ,
`district` VARCHAR(45) NULL ,
PRIMARY KEY (`iddistrict`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`city`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`city` (
`idcity` INT NOT NULL ,
`city` VARCHAR(45) NULL ,
`iddistrict` INT NULL ,
PRIMARY KEY (`idcity`) ,
INDEX `fk_city_district1` (`iddistrict` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`country`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`country` (
`idcountry` INT NOT NULL ,
`country` VARCHAR(45) NULL ,
`idcity` INT NULL ,
PRIMARY KEY (`idcountry`) ,
INDEX `fk_country_city1` (`idcity` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`address`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`address` (
`idaddress` INT NOT NULL ,
`idteacher` INT NULL ,
`address` VARCHAR(45) NULL ,
`idcountry` INT NULL ,
PRIMARY KEY (`idaddress`) ,
INDEX `fk_address_teacher1` (`idteacher` ASC) ,
INDEX `fk_address_country1` (`idcountry` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`education`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`education` (
`ideducation` INT NOT NULL ,
`idteacher` INT NULL ,
`iduniversity` INT NULL ,
`idinstitute` INT NULL ,
`graduationyear` YEAR NULL ,
`highereducationgrade` VARCHAR(45) NULL ,
`highschoolname` VARCHAR(45) NULL ,
`highschooldegree` VARCHAR(45) NULL ,
`highschoolgrade` INT NULL ,
PRIMARY KEY (`ideducation`) ,
INDEX `fk_education_teacher1` (`idteacher` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`university`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`university` (
`iduniversity` INT NOT NULL ,
`universityname` VARCHAR(45) NULL ,
`idfaculty` INT NULL ,
PRIMARY KEY (`iduniversity`) ,
INDEX `fk_university_education1` (`iduniversity` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`faculty`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`faculty` (
`idfaculty` INT NOT NULL ,
`facultyname` VARCHAR(45) NULL ,
`faculty_major` VARCHAR(45) NULL ,
PRIMARY KEY (`idfaculty`) ,
INDEX `fk_faculty_university1` (`idfaculty` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`institute`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`institute` (
`idinstitute` INT NOT NULL ,
`institutename` VARCHAR(45) NULL ,
`institute_major` VARCHAR(45) NULL ,
PRIMARY KEY (`idinstitute`) ,
INDEX `fk_institute_education1` (`idinstitute` ASC) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `mydb`.`job`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`job` (
`idjob` INT NOT NULL ,
`job_title` VARCHAR(45) NULL ,
`employer` VARCHAR(45) NULL ,
`employer_idcountry` INT NULL ,
`job_from_date` DATE NULL ,
`job_to_date` DATE NULL ,
`job_description` VARCHAR(45) NULL ,
`current_job` TINYINT(1) NULL ,
`idteacher` INT NULL ,
PRIMARY KEY (`idjob`) ,
INDEX `fk_job_teacher1` (`idteacher` ASC) ,
INDEX `fk_job_country1` (`employer_idcountry` ASC) ,
INDEX `fk_job_subject_grade1` (`idteacher` ASC) )
ENGINE = InnoDB;
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09-07-09, 08:12
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SQL Consultant
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Join Date: Apr 2002
Location: Toronto, Canada
Posts: 19,524
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here are a couple of starting points
you do ~not~ need "idgrade" to be the PK for the grades table -- use the grade as the PK here, and as the FK in the subject_grade table
having phone and cellphone side by side in the phones table is wrong
using an id for the country table is a poor choice for PK when there are several international standards for country codes
also, it appears that each country can have only one city
the address table needs work, as it doesn't give a city
the education and jobs tables need a lot of work
tip: if you go so far as to create actual tables from your design, it is only a small additional step to populate these tables with a few sample rows of meaningful data (not garbage) -- this will often bring problems with PKs and FKs to light
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