You can limit the number of records returned from the query, by using the "LIMIT" statement:
Select the 5 first records in the "customers" table:
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "yourusername",
password: "yourpassword",
database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
var sql = "SELECT * FROM customers
LIMIT 5";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
});
});
Run example »
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.js
Which 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'}
]
If you want to return five records, starting from the third record, you can use the "OFFSET" keyword:
Start from position 3, and return the next 5 records:
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "yourusername",
password: "yourpassword",
database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
var sql = "SELECT * FROM customers
LIMIT 5 OFFSET 2";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
});
});
Run example »
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.js
Which 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'}
]
You can also write your SQL statement like this "LIMIT 2, 5" which returns the same as the offset example above:
Start from position 3, and return the next 5 records:
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "yourusername",
password: "yourpassword",
database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
var sql = "SELECT * FROM customers
LIMIT 2, 5";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
});
});
Run example »
Note: The numbers are reversed: "LIMIT 2, 5" is the same as "LIMIT 5 OFFSET 2"
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