How to create multiple tables in a database in sqflite?

Question

Im building and app with flutter that uses SQLite database. I have created first table using this piece of code:

 void _createDb(Database db, int newVersion) async {
    await db.execute('''CREATE TABLE cards (id_card INTEGER PRIMARY KEY, 
         color TEXT, type TEXT, rarity TEXT, name TEXT UNIQUE, goldCost INTEGER,
         manaCost INTEGER, armor INTEGER, attack INTEGER, health INTEGER, description TEXT)''');
}

Table gets created and I can access it without problems.

Unfortunately I cannot include more than 1 table that i just created. I tried adding another SQL CREATE TABLE clause in the same method, and repeating method db.execute with a different SQL clause just in the next line.

I'm mimicing code from this tutorial: https://www.youtube.com/watch?v=xke5_yGL0uk

How to add another table within the same database?

Answer 1

You can just combine multiple db.execute calls for exampple

await db.execute('''
      create table $reminderTable (
        $columnReminderId integer primary key autoincrement,
        $columnReminderCarId integer not null,
        $columnReminderName text not null,
        $columnReminderNotifyMileage integer not null,
        $columnReminderEndMileage integer not null
       )''');
await db.execute('''
       create table $carTable (
        $columnCarId integer primary key autoincrement,
        $columnCarTitle text not null
       )''');

Answer 2

yes you can do it

 void _createDb(Database db, int newVersion) async {
 await db.execute('''
   create table $carTable (
    $columnCarId integer primary key autoincrement,
    $columnCarTitle text not null
   )''');
 await db.execute('''
   create table $userTable(
    $userId integer primary key autoincrement,
    $name text not null
   )''');
  }

but to speed up the process, let's assume we have 10 tables, you could use the batch this way

void _createDb(Database db, int newVersion) async {
Batch batch = db.batch();
batch.execute("Your query-> Create table if not exists");
batch.execute("Your query->Create table if not exists");
List<dynamic> res = await batch.commit();
//Insert your controls
}

Answer 3

You can use a .sql file that contains your DB script.

First,add the script file to assets.

Then, import the following packages:

import 'package:path/path.dart';

import 'package:sqflite/sqflite.dart';

import 'package:flutter/services.dart' show rootBundle;

finally, use the following code

void _createDb() async 
{
      final database = openDatabase( join( await getDatabasesPath(), 'mydb.db'),
      onCreate: (db, version) async  
      {
          // call database script that is saved in a file in assets
          String script =  await rootBundle.loadString("assets\\db\\script.sql");
          List<String> scripts = script.split(";");
          scripts.forEach((v) 
          {
              if(v.isNotEmpty ) 
              {
                   print(v.trim());
                   db.execute(v.trim());
              }
          });
       },
       version: 1,
       );
}