Pham Van Tuan - Database assignment 1

db.sql

@@ -0,0 +1,198 @@
+-- MySQL dump 10.13  Distrib 8.0.32, for macos13.0 (arm64)
+--
+-- Host: localhost    Database: be_pro
+-- ------------------------------------------------------
+-- Server version	8.0.32
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!50503 SET NAMES utf8mb4 */;
+/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
+/*!40103 SET TIME_ZONE='+00:00' */;
+/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+
+--
+-- Current Database: `be_pro`
+--
+
+CREATE DATABASE /*!32312 IF NOT EXISTS*/ `be_pro` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */;
+
+USE `be_pro`;
+
+--
+-- Table structure for table `classes`
+--
+
+DROP TABLE IF EXISTS `classes`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `classes` (
+  `class_id` int NOT NULL AUTO_INCREMENT,
+  `class_name` varchar(255) DEFAULT NULL,
+  `prof_id` int DEFAULT NULL,
+  `course_id` int DEFAULT NULL,
+  `room_id` int DEFAULT NULL,
+  PRIMARY KEY (`class_id`),
+  UNIQUE KEY `room_id` (`room_id`),
+  KEY `fk_professor_class` (`prof_id`),
+  KEY `fk_courses_class` (`course_id`),
+  CONSTRAINT `fk_courses_class` FOREIGN KEY (`course_id`) REFERENCES `courses` (`course_id`),
+  CONSTRAINT `fk_professor_class` FOREIGN KEY (`prof_id`) REFERENCES `professors` (`prof_id`),
+  CONSTRAINT `fk_room_class` FOREIGN KEY (`room_id`) REFERENCES `rooms` (`room_id`)
+) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `classes`
+--
+
+LOCK TABLES `classes` WRITE;
+/*!40000 ALTER TABLE `classes` DISABLE KEYS */;
+INSERT INTO `classes` VALUES (1,'classA',1,1,1),(2,'classB',1,2,2),(3,'classC',2,3,3);
+/*!40000 ALTER TABLE `classes` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `courses`
+--
+
+DROP TABLE IF EXISTS `courses`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `courses` (
+  `course_id` int NOT NULL AUTO_INCREMENT,
+  `course_name` varchar(50) DEFAULT NULL,
+  PRIMARY KEY (`course_id`)
+) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `courses`
+--
+
+LOCK TABLES `courses` WRITE;
+/*!40000 ALTER TABLE `courses` DISABLE KEYS */;
+INSERT INTO `courses` VALUES (1,'courseA'),(2,'courseB'),(3,'courseC');
+/*!40000 ALTER TABLE `courses` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `enrolls`
+--
+
+DROP TABLE IF EXISTS `enrolls`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `enrolls` (
+  `stud_id` int NOT NULL,
+  `class_id` int NOT NULL,
+  `grade` varchar(3) DEFAULT NULL,
+  PRIMARY KEY (`stud_id`,`class_id`),
+  KEY `fk_class_enroll` (`class_id`),
+  CONSTRAINT `fk_class_enroll` FOREIGN KEY (`class_id`) REFERENCES `classes` (`class_id`),
+  CONSTRAINT `fk_student_enroll` FOREIGN KEY (`stud_id`) REFERENCES `students` (`stud_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `enrolls`
+--
+
+LOCK TABLES `enrolls` WRITE;
+/*!40000 ALTER TABLE `enrolls` DISABLE KEYS */;
+INSERT INTO `enrolls` VALUES (1,1,'A'),(1,2,'B'),(2,1,'A'),(2,2,'B'),(2,3,'A'),(3,1,'B'),(3,2,'C'),(4,1,'A'),(4,2,'D'),(4,3,'B');
+/*!40000 ALTER TABLE `enrolls` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `professors`
+--
+
+DROP TABLE IF EXISTS `professors`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `professors` (
+  `prof_id` int NOT NULL AUTO_INCREMENT,
+  `prof_lname` varchar(50) DEFAULT NULL,
+  `prof_fname` varchar(50) DEFAULT NULL,
+  PRIMARY KEY (`prof_id`)
+) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `professors`
+--
+
+LOCK TABLES `professors` WRITE;
+/*!40000 ALTER TABLE `professors` DISABLE KEYS */;
+INSERT INTO `professors` VALUES (1,'prof_A','A'),(2,'prof_B','B'),(3,'prof_C','C'),(4,'prof_D','D');
+/*!40000 ALTER TABLE `professors` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `rooms`
+--
+
+DROP TABLE IF EXISTS `rooms`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `rooms` (
+  `room_id` int NOT NULL AUTO_INCREMENT,
+  `room_loc` varchar(50) DEFAULT NULL,
+  `room_cap` varchar(50) DEFAULT NULL,
+  PRIMARY KEY (`room_id`)
+) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `rooms`
+--
+
+LOCK TABLES `rooms` WRITE;
+/*!40000 ALTER TABLE `rooms` DISABLE KEYS */;
+INSERT INTO `rooms` VALUES (1,'room1','30'),(2,'room2','33'),(3,'room3','28');
+/*!40000 ALTER TABLE `rooms` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `students`
+--
+
+DROP TABLE IF EXISTS `students`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `students` (
+  `stud_id` int NOT NULL AUTO_INCREMENT,
+  `stud_lname` varchar(50) DEFAULT NULL,
+  `stud_fname` varchar(50) DEFAULT NULL,
+  `stud_street` varchar(255) DEFAULT NULL,
+  `stud_city` varchar(50) DEFAULT NULL,
+  `stud_zip` varchar(10) DEFAULT NULL,
+  PRIMARY KEY (`stud_id`)
+) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `students`
+--
+
+LOCK TABLES `students` WRITE;
+/*!40000 ALTER TABLE `students` DISABLE KEYS */;
+INSERT INTO `students` VALUES (1,'stud_A','sA','street1','city1','001'),(2,'stud_B','sB','street2','city2','002'),(3,'stud_C','sC','street3','city3','003'),(4,'stud_D','sD','street4','city4','004');
+/*!40000 ALTER TABLE `students` ENABLE KEYS */;
+UNLOCK TABLES;
+/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
+
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
+
+-- Dump completed on 2023-05-26  0:39:18

sol-1.sql

@@ -0,0 +1,8 @@
+SELECT stock_name, SUM(
+  CASE 
+    WHEN operation = 'Sell' THEN price
+    ELSE  - price
+  END 
+) as capital_gain_loss
+FROM Stocks
+GROUP BY stock_name

sol-2.sql

@@ -0,0 +1,23 @@
+select
+    t1.category,
+    count(t2.category) as accounts_count
+from (
+        SELECT 'Low Salary' AS category
+        UNION ALL
+        SELECT
+            'Average Salary' AS category
+        UNION ALL
+        SELECT
+            'High Salary' AS category
+    ) as t1
+    LEFT JOIN (
+        SELECT
+            CASE
+                WHEN income < 20000 THEN 'Low Salary'
+                WHEN income >= 20000
+                AND income <= 50000 THEN 'Average Salary'
+                ELSE 'High Salary'
+            END AS category
+        FROM Accounts
+    ) AS t2 ON t1.category = t2.category
+group by t2.category

sol-3-create-tables.sql

@@ -0,0 +1,52 @@
+CREATE TABLE professors (
+    prof_id int NOT NULL AUTO_INCREMENT,
+    prof_lname VARCHAR(50),
+    prof_fname VARCHAR(50),
+    PRIMARY KEY (prof_id)
+);
+
+CREATE TABLE students (
+    stud_id int NOT NULL AUTO_INCREMENT,
+    stud_lname VARCHAR(50),
+    stud_fname VARCHAR(50),
+    stud_street VARCHAR(255),
+    stud_city VARCHAR(50),
+    stud_zip VARCHAR(10),
+    PRIMARY KEY (stud_id)
+);
+
+
+CREATE TABLE rooms (
+    room_id int NOT NULL AUTO_INCREMENT,,
+    room_loc VARCHAR(50),
+    room_cap VARCHAR(50),
+    PRIMARY KEY (room_id)
+);
+
+CREATE TABLE courses (
+    course_id int NOT NULL AUTO_INCREMENT,,
+    course_name VARCHAR(50),
+    PRIMARY KEY (course_id)
+);
+
+CREATE TABLE classes (
+    class_id int NOT NULL AUTO_INCREMENT,,
+    class_name VARCHAR(255),
+    prof_id int,
+    course_id int,
+    room_id int,
+    PRIMARY KEY (class_id),
+    UNIQUE (room_id),
+    CONSTRAINT fk_professor_class FOREIGN KEY (prof_id) REFERENCES professors(prof_id),
+    CONSTRAINT fk_room_class FOREIGN KEY (room_id) REFERENCES rooms(room_id),
+    CONSTRAINT fk_courses_class FOREIGN KEY (course_id) REFERENCES courses(course_id)
+);
+
+CREATE TABLE enrolls (
+    stud_id int,
+    class_id int,
+    grade VARCHAR(3),
+    PRIMARY KEY (stud_id, class_id),
+    CONSTRAINT fk_student_enroll FOREIGN KEY (stud_id) REFERENCES students(stud_id),
+    CONSTRAINT fk_class_enroll FOREIGN KEY (class_id) REFERENCES classes(class_id)
+);