gistfile1.ts

import { IonicPage } from 'ionic-angular';
import { SqlProvider } from '../path/to/sql-provider';

@IonicPage()
@Component({
  selector: 'page-home',
  templateUrl: 'home.html',
})
export class HomePage {

  constructor(private sql:SqlProvider) {
  }
  
  async ionViewDidLoad () {
     await this.sql.dbInstance.executeSql('CREATE TABLE IF NOT EXISTS user(id INTEGER PRIMARY KEY, name)');
     await this.sql.dbInstance.executeSql(`INSERT INTO user(id, user) VALUES (1, 'Suraj')`);
     let users = await this.sqlInstance.executeSql('SELECT * FROM user');
     console.log(users);
  }
}

Could you please let me know, which variable is this -> this.sqlInstance ?