private GetOfflineTransactionCountDataResponse GetOfflineTransactionCount(SqliteDatabaseContext databaseContext)
{
string queryString = string.Format("SELECT COUNT(TRANSACTIONID) FROM {0};", MainRetailTransactionTableName);
int offlineTransactionsCount = (int)databaseContext.ExecuteScalar <int>(new SqlQuery(queryString));
return(new GetOfflineTransactionCountDataResponse(offlineTransactionsCount));
}