[02] Added schema sql

Signed-off-by: Jim Martens <github@2martens.de>

02/sql/schema.sql

@@ -0,0 +1,80 @@
+CREATE TABLE EstateAgent (
+  name VARCHAR(255) NOT NULL,
+  address VARCHAR(255) NOT NULL,
+  login VARCHAR(255) PRIMARY KEY NOT NULL,
+  password VARCHAR(255) NULL
+);
+
+CREATE TABLE Estate (
+  ID int NOT NULL PRIMARY KEY,
+  city VARCHAR(255) NOT NULL,
+  postalCode VARCHAR(5) NOT NULL,
+  street VARCHAR(255) NOT NULL,
+  streetNumber int NOT NULL,
+  squareArea int NOT NULL,
+  agent VARCHAR(255),
+  FOREIGN KEY (agent) REFERENCES EstateAgent(login)
+);
+
+CREATE TABLE Apartment (
+  ID int NOT NULL PRIMARY KEY,
+  floor int NOT NULL,
+  rent int NOT NULL,
+  rooms int NOT NULL,
+  balcony SMALLINT NOT NULL,
+  builtInKitchen SMALLINT NOT NULL ,
+  FOREIGN KEY (ID) REFERENCES Estate(ID)
+);
+
+CREATE TABLE House (
+  ID int NOT NULL PRIMARY KEY,
+  price int NOT NULL,
+  garden SMALLINT NOT NULL,
+  FOREIGN KEY (ID) REFERENCES Estate(ID)
+);
+
+CREATE TABLE Contract (
+  contractNumber int NOT NULL PRIMARY KEY,
+  date DATE NOT NULL,
+  place VARCHAR(255) NOT NULL
+);
+
+CREATE TABLE PurchaseContract (
+  contractNumber int NOT NULL PRIMARY KEY,
+  numberOfInstallments int NOT NULL,
+  interestRate int NOT NULL,
+  FOREIGN KEY (contractNumber) REFERENCES Contract(contractNumber)
+);
+
+CREATE TABLE TenancyContract (
+  contractNumber int NOT NULL PRIMARY KEY,
+  startDate DATE NOT NULL,
+  duration int NOT NULL,
+  additionalCosts int NOT NULL,
+  FOREIGN KEY (contractNumber) REFERENCES Contract(contractNumber)
+);
+
+CREATE TABLE Person (
+  ID int NOT NULL PRIMARY KEY,
+  firstName VARCHAR(255) NOT NULL,
+  name VARCHAR(255) NOT NULL,
+  address VARCHAR(255) NOT NULL
+);
+
+CREATE TABLE Sales (
+  contractNumber int NOT NULL PRIMARY KEY,
+  personID int NOT NULL,
+  house int UNIQUE NOT NULL,
+  FOREIGN KEY (contractNumber) REFERENCES PurchaseContract(contractNumber),
+  FOREIGN KEY (personID) REFERENCES Person(ID),
+  FOREIGN KEY (house) REFERENCES House(ID)
+);
+
+CREATE TABLE Rentals (
+  contractNumber int NOT NULL PRIMARY KEY,
+  personID int NOT NULL,
+  apartment int UNIQUE NOT NULL,
+  FOREIGN KEY (contractNumber) REFERENCES TenancyContract(contractNumber),
+  FOREIGN KEY (personID) REFERENCES Person(ID),
+  FOREIGN KEY (apartment) REFERENCES Apartment(ID)
+);