delete method
Implementation
Future<DatabaseResult> delete(String tableName, String where, List<String> whereValueList) async {
DatabaseResult databaseResult;
try {
await _database!.delete(tableName, where: where, whereArgs: whereValueList);
databaseResult = DatabaseResult._deleteGood();
} catch (e) {
databaseResult = DatabaseResult._error(e as Exception);
}
debugUtil.log(databaseResult.toString());
return databaseResult;
}