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: