Discuss, analyse and apply techniques for information, data and knowledge management for the following sql code:

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

-- -----------------------------------------------------
-- Schema Pupil Database Systems
-- -----------------------------------------------------

-- -----------------------------------------------------
-- Schema Pupil Database Systems
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `Pupil Database Systems` DEFAULT CHARACTER SET utf8 ;
USE `Pupil Database Systems` ;

-- -----------------------------------------------------
-- Table `Pupil Database Systems`.`Pupils`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Pupil Database Systems`.`Pupils` (
  `StudentName` VARCHAR(50) NOT NULL,
  `PoB` VARCHAR(50) NULL,
  `DoB` DATE NULL,
  `HomeSchool` VARCHAR(45) NULL,
  `City` VARCHAR(45) NULL,
  `Country` VARCHAR(45) NULL,
  `Nationality` VARCHAR(45) NULL,
  `Ethnicity` VARCHAR(45) NULL,
  `SEN` VARCHAR(45) NULL,
  `FSM` VARCHAR(45) NULL,
  `FSMK` VARCHAR(45) NULL,
  `SPEAKWELSH` VARCHAR(45) NULL,
  `HOMEWELSH` VARCHAR(45) NULL,
  `EnrollmentStatus` VARCHAR(45) NULL,
  `ContactNumber` VARCHAR(45) NULL,
  PRIMARY KEY (`StudentName`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `Pupil Database Systems`.`Schools`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Pupil Database Systems`.`Schools` (
  `Name` VARCHAR(50) NOT NULL,
  `City` VARCHAR(45) NULL,
  `Country` VARCHAR(45) NULL,
  `PostCode` VARCHAR(45) NULL,
  `LEA` VARCHAR(45) NULL,
  `SchoolID` VARCHAR(45) NULL,
  `ContactNumber` VARCHAR(45) NULL,
  `SchoolType` VARCHAR(45) NULL,
  `WelshMedia` VARCHAR(45) NULL,
  PRIMARY KEY (`Name`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `Pupil Database Systems`.`KS1Results`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Pupil Database Systems`.`KS1Results` (
  `Year` INT NOT NULL,
  `English` INT NULL,
  `Welsh` INT NULL,
  `Maths` INT NULL,
  `Science` INT NULL,
  `CSI` INT NULL,
  PRIMARY KEY (`Year`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `Pupil Database Systems`.`KS2Results`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Pupil Database Systems`.`KS2Results` (
  `Year` INT NOT NULL,
  `English` INT NULL,
  `Welsh` INT NULL,
  `Maths` INT NULL,
  `Science` INT NULL,
  `CSI` INT NULL,
  PRIMARY KEY (`Year`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `Pupil Database Systems`.`KS3Results`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Pupil Database Systems`.`KS3Results` (
  `Year` INT NOT NULL,
  `English` INT NULL,
  `Welsh` INT NULL,
  `Maths` INT NULL,
  `Science` INT NULL,
  `CSI` INT NULL,
  PRIMARY KEY (`Year`))
ENGINE = InnoDB;

USE `Pupil Database Systems` ;

-- -----------------------------------------------------
-- Placeholder table for view `Pupil Database Systems`.`Pupils`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `Pupil Database Systems`.`Pupils` (`StudentName` INT);

-- -----------------------------------------------------
-- View `Pupil Database Systems`.`Pupils`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `Pupil Database Systems`.`Pupils`;
USE `Pupil Database Systems`;
CREATE  OR REPLACE VIEW `Pupils` AS
SELECT StudentName
FROM Pupils
WHERE Country = Wales;

SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;