Limit the Result
You can limit the number of records returned from the query, by using the "LIMIT" statement:
Example
Select the 5 first records in the "customers" table:
let mysql = require('mysql');
let con = mysql.createConnection({
host: "localhost", user: "yourusername",
password: "yourpassword", database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
let sql = "SELECT * FROM customers LIMIT 5 ";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
});
});Save the code above in a file called "demo_db_limit.js" and run the file:
Run "demo_db_limit.js"
C:\Users\
Your Name
>node demo_db_limit.jsWhich will give you this result
[ { id: 1, name: 'John', address: 'Highway 71'}, { id: 2, name: 'Peter', address: 'Lowstreet 4'}, { id: 3, name: 'Amy', address: 'Apple st 652'}, { id: 4, name: 'Hannah', address: 'Mountain 21'}, { id: 5, name: 'Michael', address: 'Valley 345'}
]Start From Another Position
If you want to return five records, starting from the third record, you can use the "OFFSET" keyword:
Example
Start from position 3, and return the next 5 records:
let mysql = require('mysql');
let con = mysql.createConnection({
host: "localhost", user: "yourusername",
password: "yourpassword", database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
let sql = "SELECT * FROM customers LIMIT 5 OFFSET 2 ";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
});
});Note
"OFFSET 2", means starting from the third position, not the second!
Save the code above in a file called "demo_db_offset.js" and run the file:
Run "demo_db_offset.js"
C:\Users\
Your Name
>node demo_db_offset.jsWhich will give you this result
[ { id: 3, name: 'Amy', address: 'Apple st 652'}, { id: 4, name: 'Hannah', address: 'Mountain 21'}, { id: 5, name: 'Michael', address: 'Valley 345'},
{ id: 6, name: 'Sandy', address: 'Ocean blvd 2'}, { id: 7, name: 'Betty', address: 'Green Grass 1'}
]Shorter Syntax
You can also write your SQL statement like this "LIMIT 2, 5" which returns the same as the offset example above:
Example
Start from position 3, and return the next 5 records:
let mysql = require('mysql');
let con = mysql.createConnection({
host: "localhost", user: "yourusername",
password: "yourpassword", database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
let sql = "SELECT * FROM customers LIMIT 2, 5 ";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
});
});Note
The numbers are reversed: "LIMIT 2, 5" is the same as "LIMIT 5 OFFSET 2"