Hussam w2 database

Week2/Assignment/ Aggregate.js

@@ -0,0 +1,18 @@
+const {client} = require('./connection');
+async function runQuery() {
+try{
+    await client.query(`SELECT RP.paper_title,COUNT(PA.author_id) FROM research_papers RP LEFT JOIN papers_authors PA ON RP.paper_id=PA.paper_id GROUP BY RP.paper_title`);
+    await client.query(`SELECT COUNT(PA.paper_id) AS total_papers_by_female FROM author A JOIN papers_authors PA ON A.author_id = PA.author_id WHERE A.gender = 'F';`);
+    await client.query(`SELECT A.university,AVG(A.h_index) AS avg_h_index FROM author A GROUP BY A.university;`);
+    await client.query(`SELECT A.university,COUNT(PA.paper_id) AS research_papers FROM author A JOIN papers_authors PA ON A.author_id=PA.author_id GROUP BY A.university`);
+    await client.query(`SELECT A.university,MIN(A.h_index) AS min_h_index,MAX(A.h_index) AS max_h_index FROM author A GROUP BY A.university`);
+
+
+}
+catch(err){
+    console.error('Error executing query', err.stack);
+} finally {
+    await client.end();
+}
+}
+runQuery();

Week2/Assignment/Joins.js

@@ -0,0 +1,12 @@
+const {client} = require('./connection');
+async function runQuery() {
+    try {
+        await client.query(`SELECT a.author_name,a2.author_name AS mentor_name FROM author a INNER JOIN author a2 ON a2.author_id=a.mentor`);
+        await client.query(`SELECT A.*,RP.paper_title FROM author A LEFT JOIN papers_authors PA ON A.author_id=PA.author_id  LEFT JOIN research_papers RP ON PA.paper_id=RP.paper_id);`);
+
+    } catch (err) {
+        console.error('Error executing query', err.stack);
+    } finally {
+        await client.end();
+    }
+}

Week2/Assignment/Keys.js

@@ -0,0 +1,28 @@
+const {client}=require('./connection');
+async function main(){
+    try{
+const creatTableAuthor = `
+CREATE TABLE IF NOT EXISTS author(
+    author_id SERIAL PRIMARY KEY,
+    author_name VARCHAR(100) NOT NULL,
+    university VARCHAR(100) NOT NULL,
+    date_of_birth DATE NOT NULL,
+    h_index INT NOT NULL,
+    gender CHAR(1) NOT NULL CHECK (gender IN ('M', 'F', 'O'))
+);`;
+
+    const alterTableAuthor = `ALTER TABLE author ADD COLUMN mentor INT REFERENCES author(author_id);`;
+
+    await client.query(creatTableAuthor);
+    await client.query(alterTableAuthor);
+    console.log('Table created and altered successfully');
+
+    }catch(err){
+        console.error('Connection error',err.stack);
+    }
+    finally{
+        await client.end();
+    }
+
+}
+main();

Week2/Assignment/Relationships.js

@@ -0,0 +1,30 @@
+const {Client}=require ('pg');
+async function main(){
+try{
+    await client.connect();
+const creatTableResearch_Papers = `
+CREATE TABLE IF NOT EXISTS research_papers(
+    paper_id SERIAL PRIMARY KEY,
+    paper_title VARCHAR(200) NOT NULL,
+    conference VARCHAR(100) NOT NULL,
+    publish_date DATE NOT NULL
+);`;
+
+ const creatPapers_authors=`CREATE TABLE IF NOT EXISTS papers_authors(
+ paper_id INT REFERENCES research_papers(paper_id),
+ author_id INT REFERENCES author(author_id),
+ PRIMARY KEY (paper_id, author_id)
+ );`;
+await client.query(creatTableResearch_Papers);
+console.log('Table created successfully');
+
+
+}
+catch(err){
+    console.error('Connection error',err.stack);
+}
+finally{
+    await client.end();
+}
+}
+main();

Week2/Assignment/connection.js

@@ -0,0 +1,10 @@
+const {Client}= require('pg');
+    const client= new Client({
+        user:'hyfuser',
+        host:'localhost',
+        database:'authoers',
+        password:'hyfpassword',
+        port:5432,
+    });
+    client.connect();
+    module.exports=client;

Week2/Assignment/insert.js

@@ -0,0 +1,73 @@
+const {client}=require('./connection');
+async function runQuery(){
+    try{
+     await client.query(`INSERT INTO author(author_name, university, date_of_birth, h_index, gender, mentor)
+VALUES
+('Alice Smith', 'MIT', '1980-03-15', 35, 'F', NULL),
+('Bob Johnson', 'Stanford', '1975-07-22', 40, 'M', 1),      
+('Carol Williams', 'Harvard', '1982-11-05', 28, 'F', NULL),
+('David Brown', 'Oxford', '1978-01-17', 45, 'M', 3),         
+('Emma Davis', 'Cambridge', '1985-09-10', 30, 'F', NULL),
+('Frank Miller', 'UCLA', '1979-12-03', 50, 'M', 2),           
+('Grace Wilson', 'Yale', '1983-05-25', 33, 'F', NULL),
+('Henry Moore', 'Princeton', '1981-08-12', 38, 'M', 5),       
+('Ivy Taylor', 'Columbia', '1986-02-20', 27, 'F', NULL),
+('Jack Anderson', 'Caltech', '1977-06-30', 42, 'M', 4),       
+('Karen Thomas', 'Imperial College', '1984-10-15', 31, 'F', NULL),
+('Leo Jackson', 'ETH Zurich', '1980-04-01', 36, 'M', 7),       
+('Mia White', 'Sorbonne', '1987-01-11', 29, 'F', NULL),
+('Nick Harris', 'Tokyo University', '1976-03-22', 47, 'M', 10),
+('Olivia Martin', 'Seoul National University', '1982-07-18', 34, 'F', NULL);
+`);
+    console.log('Data inserted successfully');
+    await client.query(`INSERT INTO research_papers(paper_title, conference, publish_date)
+VALUES
+('AI in Healthcare', 'NeurIPS', '2020-06-15'),
+('Quantum Computing Basics', 'QIP', '2019-05-10'),
+('Machine Learning Algorithms', 'ICML', '2021-07-20'),
+('Robotics Advances', 'ICRA', '2018-04-12'),
+('Data Privacy Techniques', 'USENIX', '2020-11-05'),
+('Blockchain in Finance', 'IEEE Blockchain', '2019-09-15'),
+('Natural Language Processing', 'ACL', '2021-08-01'),
+('Computer Vision Trends', 'CVPR', '2020-06-22'),
+('Cybersecurity Methods', 'Black Hat', '2021-02-10'),
+('Cloud Computing Models', 'IEEE Cloud', '2019-12-05'),
+('Deep Learning Optimization', 'NeurIPS', '2020-12-12'),
+('IoT Security Challenges', 'IoTDI', '2018-10-20'),
+('Augmented Reality Systems', 'ISMAR', '2019-09-30'),
+('Reinforcement Learning', 'ICML', '2020-05-18'),
+('Edge Computing Applications', 'IEEE Edge', '2021-03-10'),
+('Genomics Data Analysis', 'Bioinformatics', '2018-07-12'),
+('Smart Cities Research', 'IEEE SmartCity', '2020-01-25'),
+('Big Data Analytics', 'KDD', '2019-08-22'),
+('Autonomous Vehicles', 'IV', '2021-04-05'),
+('Renewable Energy Systems', 'IEEE PES', '2020-03-30'),
+('Graph Neural Networks', 'NeurIPS', '2021-06-12'),
+('Human-Computer Interaction', 'CHI', '2019-05-18'),
+('Sentiment Analysis', 'ACL', '2020-09-20'),
+('Protein Folding Prediction', 'ICML', '2021-02-14'),
+('Virtual Reality Education', 'VRST', '2018-11-01'),
+('Social Network Analysis', 'WWW', '2019-03-12'),
+('Medical Imaging', 'MICCAI', '2020-07-15'),
+('Autonomous Drones', 'ICRA', '2021-05-20'),
+('Smart Home IoT', 'IEEE IoT', '2019-12-08'),
+('Energy Efficient Computing', 'ISCA', '2020-10-25');`);
+    console.log('Data inserted successfully');
+
+    await client.query(`INSERT INTO papers_authors(paper_id, author_id)
+VALUES
+(1,1),(1,2),(2,3),(2,4),(3,5),(3,6),(4,7),(4,8),
+(5,9),(5,10),(6,11),(6,12),(7,13),(7,14),(8,15),
+(9,1),(10,2),(11,3),(12,4),(13,5),(14,6),(15,7),
+(16,8),(17,9),(18,10),(19,11),(20,12),(21,13),
+(22,14),(23,15),(24,1),(25,2),(26,3),(27,4),
+(28,5),(29,6),(30,7);`)
+
+
+
+    }
+    catch(err){
+        console.error('Connection error',err.stack);
+    }
+
+    }

Week2/Assignment/package.json

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+{
+  "name": "assignment",
+  "version": "1.0.0",
+  "main": "Keys.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "pg": "^8.16.3"
+  }
+}