rizan_ibrahim-w1-database

Week1/assignment/3.1-exercise/connection-test.js

@@ -0,0 +1,70 @@
+import mysql from "mysql2";
+const connection = mysql.createConnection({
+  host: "localhost",
+  user: "hyfuser",
+  password: "hyfpassword",
+  multipleStatements: true,
+});
+
+const setUpQueries = `
+DROP DATABASE IF EXISTS meetup;
+create database meetup;
+use meetup;
+
+/* create invite table */
+
+create table invitee(
+invitee_no int auto_increment primary key,
+invitee_name varchar(100),
+invitee_by varchar(100)
+);
+
+/* create room table */
+
+create table room (
+room_no int auto_increment primary key,
+room_name varchar (100),
+floor_no TINYINT UNSIGNED,
+);
+
+/* create meeting table */
+
+create table meeting (
+meeting_no int auto_increment primary key,
+meeting_title varchar(200),
+starting_time DATETIME,
+ending_time DATETIME,
+room_no int, foreign key (room_no) references room (room_no)
+);
+
+/* inserting 5 invitees   */
+
+insert into invitee (invite_name,invite_by)
+values ('rizan','stas'),('ibrahim','gea'),('araz','ahmed'),('sara','stas'),('jasmin','shero');
+
+
+/* inserting 5 rooms   */
+insert into room (room_name,room_no)
+values ('room1',1),('room2',2),('room3',3),('room4',4),('room5',5);
+
+
+/* inserting meeting   */
+
+insert into meeting (meeting_title,starting_time,ending_time,room_no)
+values ('career-session', '2025-05-21 11:00:00', '2025-05-21 13:00:00', 1),
+('product', '2025-05-20 11:30:00', '2025-05-20 18:30:00', 2),
+('android-workshop', '2025-05-21 15:30:00', '2025-05-21 20:30:00', 3),
+('marketing', '2025-05-23 10:30:00', '2025-05-23 14:30:00', 4),
+('crypto-event', '2025-05-26 11:00:00', '2025-05-26 15:00:00', 5);
+
+`;
+connection.connect((err) => {
+  if (err) throw err;
+  console.log("connected to mysql");
+
+  connection.query(setUpQueries, (err) => {
+    if (err) throw err;
+    console.log("databese and tables and data been inserted ");
+    connection.end();
+  });
+});

Week1/assignment/3.2-exercise/queries.js

@@ -0,0 +1,37 @@
+import mysql from "mysql2";
+const connection = mysql.createConnection({
+  host: "localhost",
+  user: "hyfuser",
+  password: "hyfpassword",
+  database: "new_world",
+});
+connection.connect((err) => {
+  if (err) throw err;
+  console.log(" Connected to new_world database");
+
+  const queries = [
+    "select name from country where Population > 8000000",
+    "SELECT name FROM country WHERE name LIKE '%land%'",
+    "select name from city where population between 500000 and 1000000",
+    "SeLect Name FROM country WHERE Continent = 'Europe'",
+    "SELECT Name, SurfaceArea FROM country ORDER BY SurfaceArea DESC",
+    'select name from city where countrycode = "nld" ',
+    'select population from city where name = "rotterdam" ',
+    "select name, surfacearea from country order by surfacearea desc limit 10",
+    "select name, population from city order by population desc limit 10",
+    "select sum (population) as wrold_population from country",
+  ];
+
+  queries.forEach((query, index) => {
+    connection.query(query, (err, results) => {
+      if (err) throw err;
+      console.log(`${index + 1}:`);
+      console.table(results);
+    });
+  });
+
+  setTimeout(() => {
+    connection.end();
+    console.log("Done running all queries");
+  }, 1500);
+});