Error in SQLite IONIC 2

IT’S RETURN CANNOT READ PROPERTY ‘executeSQL’ of undefined, in other page it’s work but in page orcamento.ts it’s got error

ionViewDidEnter(){
      this.database.buscaTipoeCliente()
      .then((data) => {
        this.tipovenda = data[0].tipovenda;
        this.database.presentToastError(this.tipovenda);
        this.tipodepreco = data[0].tipodepreco;
        this.database.presentToastError(this.tipodepreco);
      }, (error) => {
        this.database.presentToastError(JSON.stringify(error.message));
        this.database.presentToastError(JSON.stringify(error.status));
      });
     
    }
public buscaTipoeCliente(){
      return new Promise((resolve, reject) => {
      this.storage = new SQLite();
      this.storage.openDatabase({name: "infosysDB.db", location: "default"})
      .then(
        (success) => {
          this.storage.executeSql("SELECT * FROM preferencias", [])
          .then((data) => {
              if(data.rows.length > 0 ){
                data = [{"tipovenda": data.rows.item(0)['tipo'], "cliente": data.rows.item(0)['cliente'], "codigo": data.rows.item(0)['codigo'], "tipodepreco": data.rows.item(0)['tipodepreco']}]
                resolve(data);
              }else if(data.rows.length <= 0){
                data = "avista";
                resolve(data);
              }
            },
            (error) => {
              this.presentToastError(JSON.stringify(error.message + "database"));
              reject(error)
              console.log("não foi possivel carregar a tabela preferencias.");
          })
        },
        (error) => {
          reject(error);
          this.presentToast("Não foi possível abrir a base de dados!");
        });
        
      });
    }

I’m baffled why you won’t just use ionic-storage, but if you insist on continuing to tilt at this windmill, make sure the platform is ready before trying to do anything with SQLite.

are you trying to run the code on actual device or browser (ionic-lab)…because SQLite plugin will only work in actual mobile device not browsers just like cordova plugins.