├── package.json
└── app.js


/package.json:
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 1 | {
 2 |   "name": "traversarynode",
 3 |   "version": "1.0.0",
 4 |   "description": "sample app MySQl with Node",
 5 |   "main": "app.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "author": "",
10 |   "license": "ISC",
11 |   "dependencies": {
12 |     "express": "^4.17.1",
13 |     "mysql": "^2.18.1",
14 |     "nodemon": "^2.0.6"
15 |   }
16 | }
17 | 


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/app.js:
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  1 | const express=require('express');
  2 | const mysql=require('mysql');
  3 | const app=express();
  4 | 
  5 | //create connection
  6 | const db=mysql.createConnection({
  7 |     localHost: "localhost",
  8 |     port: "3306",
  9 |     user: "root",
 10 |     password: "password",
 11 |     database: "user",
 12 | 
 13 | });
 14 | 
 15 | //Connect Db
 16 | 
 17 | db.connect((err)=>{
 18 |     if(err) 
 19 |     console.log("Error in connection",+err);
 20 |     else 
 21 |     console.log("Database connected");
 22 | 
 23 | })
 24 |  
 25 | //Insert Data(Post Method)
 26 | 
 27 | app.get('/user1',(req,res)=>{
 28 | let post={user_name:'Devil4',user_address:'Jhapa4'};
 29 | // var sql='INSERT INTO users SET ?';
 30 | db.query('INSERT INTO USERS SET ?',post,(err,result)=>{
 31 |     if(err) throw err;
 32 |     else
 33 |     console.log(result);
 34 |     res.send('User1 added');
 35 | 
 36 | });
 37 | 
 38 | });
 39 | 
 40 | //second post
 41 | app.get('/user2',(req,res)=>{
 42 |     let post={user_name:'Hye',user_address:'Boys'};
 43 |     let sql='INSERT INTO users SET ?';
 44 |     let query = db.query(sql,post,(err,result)=>{
 45 |         if(err) throw err;
 46 |         else
 47 |         console.log(result);
 48 |         res.send('user2 added');
 49 |         // res.send(result);
 50 |     
 51 |     });
 52 |     
 53 |     });
 54 | 
 55 | //Fetach Data
 56 | app.get('/fetchalldata',(req,res)=>{
 57 |     let sql='SELECT * FROM USERS';
 58 |     let query = db.query(sql,(err,result)=>{
 59 |         if(err) throw err;
 60 |         else
 61 |         console.log('All data from table is fetched ');
 62 |         res.send(result);
 63 |         // res.send(result);
 64 |     
 65 |     });
 66 |     
 67 |     });
 68 | 
 69 |     //Select single{inidivual } value data based on Key value
 70 |     app.get('/fetchdata/:id',(req,res)=>{
 71 |         let sql=`SELECT * FROM USERS WHERE USER_ID=${req.params.id}`;
 72 |         let query = db.query(sql,(err,result)=>{
 73 |             if(err) throw err;
 74 |             else
 75 |             console.log('Signle data is Featch ');
 76 |             res.send(result);
 77 |             // res.send(result);
 78 |         
 79 |         });
 80 |         
 81 |         });
 82 | 
 83 | //update DaTA
 84 | app.get('/updatedata/:id',(req,res)=>{
 85 |     let newusername='Programmer Devil';
 86 |     let sql=`UPDATE USERS SET USER_NAME ='${newusername}' WHERE USER_ID=${req.params.id}`;
 87 |     let query = db.query(sql,(err,result)=>{
 88 |         if(err) throw err;
 89 |         else
 90 |         console.log('Update value of userame for given ID ');
 91 |         res.send(result);
 92 |         // res.send(result);
 93 |     
 94 |     });
 95 | 
 96 | 
 97 |     });
 98 | 
 99 |     //Delete Data
100 |     app.get('/deletedata/:id',(req,res)=>{
101 |         
102 |         let sql=`DELETE FROM USERS WHERE USER_ID=${req.params.id}`;
103 |         let query = db.query(sql,(err,result)=>{
104 |             if(err) throw err;
105 |             else
106 |             console.log('DElete data for given ID ');
107 |             res.send(result);
108 |             // res.send(result);
109 |         
110 |         });
111 |     
112 |     
113 |         });
114 |     
115 | 
116 | 
117 | 
118 | //ruuning server 
119 | 
120 | app.listen('9800',(err)=>{
121 |     if(err) throw err;
122 |     else 
123 |  console.log("Server is running at port 9800");
124 | }
125 | );


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