Node.js MySQL FIELD() Function
Last Updated :
17 Feb, 2021
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FIELD() function is a built-in function in MySQL that is used to get the position of the first occurrence of a value in a set of expressions. In the case of string values, it is not case-sensitive.
Syntax:
FIELD(value, input_1, input_2, input_3, ...)
Parameters: It takes two parameters as follows:
- value: It is the given value to be searched.
- input: It is the inputs that are checked for equality against the given value.
Return Value: It returns the position of the first occurrence of a value in a set of expressions. If nothing found then it will return 0.
Module Installation: Install the mysql module using the following command:
npm install mysql
Database: Our SQL publishers table preview with sample data is shown below:
Example 1:
index.js
const mysql = require("mysql"); let db_con = mysql.createConnection({ host: "localhost", user: "root", password: '', database: 'gfg_db'}); db_con.connect((err) => { if (err) { console.log("Database Connection Failed !!!", err); return; } console.log("We are connected to gfg_db database"); // Here is the query let query = "SELECT FIELD(2, 12, 15, 2, 122) AS Output"; db_con.query(query, (err, rows) => { if(err) throw err; console.log(rows); }); }); |
Run the index.js file using the following command:
node index.js
Output:
Example 2:
index.js
const mysql = require("mysql"); let db_con = mysql.createConnection({ host: "localhost", user: "root", password: '', database: 'gfg_db'}); db_con.connect((err) => { if (err) { console.log("Database Connection Failed !!!", err); return; } console.log("We are connected to gfg_db database"); // Here is the query let query = "SELECT FIELD('geek', 'Geeek', 'gEEK', 'geeK') AS Output"; db_con.query(query, (err, rows) => { if(err) throw err; console.log(rows); }); }); |
Run the index.js file using the following command:
node index.js
Output:
