$ ionic plugin add cordova-sqlite-storage
$ npm install --save @ionic-native/sqlite

...
import { SQLite } from '@ionic-native/sqlite';
...
providers: [
 ...
 SQLite
]
...

import { Component } from '@angular/core';
import { SQLite, SQLiteObject } from '@ionic-native/sqlite';
@Component({
 selector: 'page-hello-ionic',
 templateUrl: 'hello-ionic.html'
})
export class HelloIonicPage {
 constructor(
       private sqlite: SQLite) {

 }
 database :SQLiteObject;
 ngOnInit(){
  this.initDB();
 }
 initDB(){
  this.sqlite.create({
   name: 'data.db',
   location: 'default'
  })
  .then((db: SQLiteObject) => {
  db.executeSql('create table t_log(name VARCHAR(32))', {})//建表
   .then(() => console.log('Executed SQL'))
   .catch(e => console.log(e));

  this.database = db;
  db.executeSql("insert into t_log values('123')",{});//插入数据
  })
  .catch(e => console.log(e));

 }
//查询
query() {
  let results = this.database.executeSql("select * from t_log",{});
  alert(data.rows.length);
  alert(data.rows.item(0).name);
  })
 }
}