Node.js MySQL MID() Function

MID() Function is a Builtin Function in MySQL which is used to get substring of input string between given range inclusive.

Syntax:

MID(input_string, from, length)

Parameters: MID() function accepts three parameters as mentioned above and described below.

• input_string: Substring of this input will be calculated
• from:Substring will be taken from this position
• length: Length of substring

Return Value:

MID() function returns substring of input string between given starting position and length. If length is out of string then the extra part is ignored.

Modules:

• mysql: To handle MySQL Connection and Queries

npm install mysql

SQL publishers Table Preview:

Example 1:

Javascript

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");

  // notice the ? in query
  let query = `SELECT MID("Geeks For Geeks", 7, 20) AS MID_Output`;

  db_con.query(query, (err, rows) => {
    if (err) throw err;

    console.log(rows);
  });
});

Output:

Example 2:

Javascript

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");

  // notice the ? in query
  let query = `SELECT name, MID(name, 1, 3) AS MID_Output FROM publishers`;

  db_con.query(query, (err, rows) => {
    if (err) throw err;

    console.log(rows);
  });
});

Output: