outerJoin method
Implementation
Future<List<Map<String, Object?>>> outerJoin() async {
Database db = await database;
// List<Map<String, Object?>> result = await db.rawQuery(
// "SELECT * FROM users LEFT OUTER JOIN persons ON users.id = persons.user_id");
var result = await db.rawQuery("pragma table_info('$table')");
return result;
//result.first.values.first as int;
}